Presentations at international conferences 2014

Forty Third Spring Conference of the Union of Bulgarian Mathematicians, Borovets, Bulgaria, 2014, Mobile Access to Specimens of the Bulgarian Iconography through QR Code in GPS-based Information System (Desislava Paneva-Marinova, Detelin Luchev, Zsolt László Márkus, Tibor Szkaliczki)

Informatics in the Scientific Knowledge’ 2014, Varna, Bulgaria, Application of Information Technologies to Primary Education (Stefka Kovacheva)

"Философия зайца": неожиданные перспективы гуманитарных исследований, Санкт-Петербург (Институт русской литературы (Пушкинский дом) Российской академии наук), 2014, Зайо Байо и Зайчик-Побігайчик: Образы зайца в болгарской и украинской картинах мира (Иван Держанский, Елена Сирук)

7th International Conference on Game and Entertainment Technologies 2014, Lisbon, Portugal, 2014, Trends and Challenges in Digital Games and Entertainment Evolution" (Boyan Bontchev - Keynote Speaker)

International Conference Mathematics Days in Sofia, Sofia, Bulgaria, 2014, Towards formal modelling of the neurobiological aspects of trust and trustworthiness (Sviatoslav Braynov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Interactive Environment for Digital Preservation and Preservation of Fashion Objects (Desislava Paneva-Marinova, Lilia Pavlova, Vladimir Sapundjiev, Maya Bogdanova)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Towards Wider Sharing of Iconographical Art Content (Desislava Paneva-Marinova, Maxim Goynov, Detelin Luchev)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, The IFIDA Project: Intelligent Fast Interconnected Devices and Tools for Applications in Archaeometry and Conservation Practice (Magdelena Stoyanova, Desislava Paneva-Marinova, Lilia Pavlova, Radoslav Pavlov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Project "North +": documenting, preserving and providing public access to the cultural heritage in libraries, museums, archives and galleries in North and Central Bulgaria (Kalina Ivanova, Galina Bogdanova, Kaloyan Zdravkov, Radoslav Pavlov, Desislava Paneva-Marinova)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Gaming Platform for Training on Bulgarian Traditional Costume (Detelin Luchev, Stanislava Slavova-Petkova, Maria Dimova)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Recent Developments in Digital Mathematics Libraries (Jiří Rákosník, Peter Stanchev, Radoslav Pavlov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, The Fifth National Information Day: Open Access to Scientific Information and Data (Mariela Deliverska, Guenoveva Jecheva, Yanita Zherkova, Peter Stanchev, Radoslav Pavlov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Development and Promotion of Open Access to Scientific Information and Research (Radoslav Pavlov, Peter Stanchev)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Encyclopaedia Slavica Sanctorum: Further Developments (Konstantin Rangochev, Margaret Dimitrova, Maxim Goinov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Web-based Software System for Preservation of Language Cultural Heritage (Ralitsa Dutsova)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Animal Metaphors and Idioms in the Corpus of Bulgarian and Ukrainian Parallel Texts (Ivan Derzhanski, Olena Siruk)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, How to Incorporate New Knowledge in the History Courses for 4th and 5th Grade Pupils (Stefka Kovacheva)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Coins from the Burgas Bay: Creation of a New Digital Numismatic Content in the Internet Representing the Economic and Cultural Development of Burgas Region from Ancient Times to the Present Days (Radovesta Stewart, Mariya Monova-Zheleva, Yanislav Zhelev, Lubomil Draganov)

UNESCO International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, Veliko Tarnovo, Bulgaria, 2014, Web-based Software System for Preservation of Language Heritage (Ralitsa Dutsova)

Computational Linguistics in Bulgaria (CLIB2014), Sofia, Bulgaria, 2014, Temporal Adverbs and Adverbial Expressions in a Corpus of Bulgarian and Ukrainian Parallel Texts (Ivan Derzhanski, Olena Siruk)

Сучасна філологія: парадигми, напрямки, проблеми, Киев (Київський національний університет імені Тараса Шевченка, Інститут філології; Інститут української мови НАН України; Інститут літератури ім. Т.Г. Шевченка НАН, 2014, Заячі назви в болгарській і українській народній ботаніці (Елена Сирук, Иван Держанский)

Leksykografia polska, ukraińska, bułgarska: słowniki tradycyjne i elektroniczne, Warsaw, Poland, 2014, Digital Corpora and their Applications in Semantic Studies and Lexicography (Ludmila Dimitrova, V. Koseska)

Leksykografia polska, ukraińska, bułgarska: słowniki tradycyjne i elektroniczne, Warsaw, Poland, 2014, Web-based Digital Lexicographic Bilingual Resources  (Ralitsa Dutsova)

Leksykografia polska, ukraińska, bułgarska: słowniki tradycyjne i elektroniczne, Warsaw, Poland, 2014, Electronic Dictionary as a Tool for Integration of Additional Learning Content (Stefka Kovacheva)

Smart Culture International Conference, Bruxel, Belgium, 2014, Digital Presentation and Preservation of cultural phenomena and objects (Radoslav Pavlov, Evgenia Sendova)

 

Presentations at international conferences 2013

7th International Conference Natural Language Processing, Corpus Linguistics, E-learning. SLOVKO’2013, 13 - 15 November, 2013, Bratislava, Slovakia, Software System for Processing Bulgarian Digital Resources: Parallel Corpora and Bilingual Dictionaries (Dutsova, Ralitsa and Dimitrova, Ludmila)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, European Digital Mathematics Library (Pavlov, Radoslav, Rakosnik, Jiri)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Linguistic Corpora as International Cultural Heritage: The Corpus of Bulgarian and Ukrainian Parallel Texts (Siruk, O., Derzhanski, Ivan)

ACL 2013: Fourth Workshop on Teaching Natural Language Processing and Computational Linguistics, 9 August, 2013, Sofia, Bulgaria, Rosetta Stone Linguistic Problems (Bozhanov, B., Derzhanski, Ivan)

CL 2013: Fourth Workshop on Teaching Natural Language Processing and Computational Linguistics, 9 August, 2013, Sofia, Bulgaria, Multilingual Editing of Linguistic Problems (Derzhanski, Ivan)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Recovering Valuable Artefacts of the Cultural Heritage through Mdern Technology and Equipment ( Pavlova, L., Draganov, Lubomil)

Internationa Conference Electronic Imaging&the Visual Arts (EVA 2013), 15 May, 2013, Florence, Italy, Digital Libraries and Arteries, Saving Bulgarian National Cultural Heritage (Luchev, Detelin, Paneva-Marinova, Desislava)

International Conference on Computer Systems and Technologies ComSysTech’13, 28 - 29 June, 2013, Ruse, Bulgaria, New Digital Fashion World (Detelin Luchev, Desislava Paneva-Marinova, Lilia Pavlova-Draganova, Radoslav Pavlov)

First Heidelberg Laureate Forum, 24 September, 2013, Heidelberg, Germany, Approaches for Smart Access and Organization of Digital Content in Multimedia Archives and Digital Libraries for Cultural Heritage (Desislava Paneva-Marinova)

Researchers' Night in Hungary, 27 September, 2013, Budapest, Hungary, Cultural Heritage Protection and Tourism on Smartphones (Tibor Szkaliczki, Zsolt László Márkus, Gábor Kaposi, Miklós Veres, Radoslav Pavlov, Detelin Luchev, Desislava Paneva-Marinova, Maxim Goynov)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Mobile Exploring of the Bulgarian Iconography through QR Codes in the GUIDE@HAND Tourist Guide Application (Gabor Kaposi, Tibor Szkaliczki, Zholt Márkus, Detelin Luchev, Maxim Goynov, Desislava Paneva-Marinova)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Digital Humanities: Challenges of the Transformation of Tools and Objects of Knowledge in Contemporary Humanities, Mobile Exploring of the Bulgarian Iconography through QR Codes in the GUIDE@HAND Tourist Guide Application (Alexandre Camus, Desislava Paneva-Marinova, Detelin Luchev)

Иновации и култура – регионални решения и перспективи, Регион Велико Търново – кандидат за европейска столица на културата 2019 - Семинар в рамките на Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage
19 септември, 2013, Велико Търново, България, Пътна карта за цифровизация и цифрово представяне на културно-историческото наследство на регион Велико Търново (Павлов, Р., Панева-Маринова, Д., Църова, Н.)

Иновации и култура – регионални решения и перспективи, Регион Велико Търново – кандидат за европейска столица на културата 2019 - Семинар в рамките на Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage
19 септември, 2013, Велико Търново, България, Технологични аспекти в изграждането на мултимедийна цифрова библиотека за културно наследство (Павлов, Р., Панева-Маринова, Д.)

Muzeum @ Digit, 10 - 11 June, 2013, Budapest, Hungary, Guide@Hand (Márkus, Zs., Szántó, G., Luchev, D.)

Международна научна конференция „Добре дошли в Киберия! Записки от дигиталния терен”, 20 - 21 юни, 2013, София, България, Семантично ориентирани модели за представяне на българското фолклорно наследство в цифрови библиотеки (Константин Рангочев, Маргарет Димитрова)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Encyclopaedia Slavica Sanctorum: Actyvity, Users, Statistics (Konstantin Rangochev, Maxim Goinov, Margaret Dimitrova, Iskra Hristova-Shomova)

ІV Международна научна конференция „Балканите – език, история, култура”, 18 - 20 октомври, 2013, Велико Търново, България, Модели за пренасяне на сакралност І: град Самоков (Константин Рангочев)

Международна научна конференция „Изследване на културното наследство: състояние, резултати, перспективи”, 11 - 13 ноември, 2013, София, България, Текст и хипертекст ІV. Обреди vs изследователи (Константин Рангочев)

Third International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, 18 - 21 September, 2013, Veliko Tarnovo, Bulgaria, Web-application for Presentation of Bulgarian Language Heritage: Bilingual Digital Corpora and Dictionaries (Dutsova, R.)

Presentations at international conferences 2012

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (Development of New Solutions in the Field of Digitization and Digital Presentation of the National Folklore Heritage, authors: Bogdanova, G., Pavlov, R. )

International Conference on INFORMATICS IN THE SCIENTIFIC KNOWLEDGE  ISK’2012, June 27 – 29, 2012, Varna, Bulgaria (Digital Resources for Language Technologies and Their Applications, author: Dimitrova, L.)

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage DiPP’2012, 18–21 September 2012, Veliko Tarnovo, Bulgaria (Bilingual Corpus – Digital Repository for Preservation of Language Heritage, authors: Dimitrova, L., Garabík, R.)

Second International on Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (On-line dictionary – Tool for Preservation of Language Heritage, author: Dutsova, R.)

International Conference on Computer Systems and Technologies ComSysTech’12, Ruse, Bulgaria, 22-23 June, 2012 (Content Interoperability between Digital Libraries for Orthodox Heritage, authors: Goynov, M., Paneva-Marinova, D., Pavlov, R.)

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (Personal Work Space and Content Analysis Functionality in a Cultural Heritage Digital Library, author: Paneva-Marinova, D.)

International Conference, EuroMed 2012, Lemessos, Cyprus, October 29 -- November 3, 2012 (Two Integrated Digital Libraries for Knowledge and Iconography of Orthodox Saints, authors: Paneva-Marinova, D., Pavlov, R., Goynov, M.)

International Conference on Computer Systems and Technologies ComSysTech’12, Ruse, Bulgaria, 22-23 June, 2012 (Ontological Presentation of Analysis Method for Technology-enhanced Learning, authors: Paneva-Marinova, D., Pavlova-Draganova, L., Draganov, L., Georgiev, V.)

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (Modelling the Functionality of the Multimedia Digital Library for Fashion Objects, authors: Pavlova-Draganova, L., Luchev, D., Goynov, M.)

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (Bulgarian Digital Mathematical Library BulDML and Czech Digital Mathematical Library DML-CZ as parts of the European Digital Mathematics Library EuDML, authors: Rakosnik, J., Stanchev, P., Simeonov, G., Pavlov, R.)

Second International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage, September 18-21, 2012, Veliko Tarnovo, Bulgaria (Medieval Sources and Present-Day Folklore Materials on Saints in an Electronic Encyclopedia, authors: Rangochev, K., Dimitrova, M., Paneva-Marinova, D.)

International Conference on Development of the Human Language Technologies and Resources in Slovakia and in the world – 10 years of the Slovak National Corpus, 7 – 8 June 2012, Bratislava, Slovakia (Multilingual Resources with Bulgarian – Recent Developments (IMI-BAS experience), author: Dimitrova, L.)

International Scientific Conference Informatics in the Scientific Knowledge, 2012, Varna, Varna (Innovative principles in building the I.DB.I. Artery (International DataBase for east christian Icon art), authors: Yoshinov, R., Garnizov, I.)

Second International Conference on Education, Science, Innovations ESI 2012, June 9-10 2012, Pernik, Bulgaria (Test is voting, author: Radev, Sl.)

Second International Conference on Education, Science, Innovations ESI 2012, June 9-10 2012, Pernik, Bulgaria (Interdisciplinarity and new systematic approaches, authors: Radev, Sl., Kropiwnicki, L.)

 

Presentations at international conferences 2011

Sixth International Conference NLP, Multilinguality SLOVKO’2011, 20 – 22 October 2011, Modra, Slovakia (Bulgarian–Slovak Parallel Corpus, authors: Dimitrova, Ludmila, Garabík, R.)

Sixth International Conference NLP, Multilinguality SLOVKO’2011, 20 – 22 October 2011, Modra, Slovakia (Bulgarian-Polish-Lithuanian Corpus – Recent Progress and Application, authors: Dimitrova, Ludmila, Koseska–Toszewa, V., Roszko, D., Roszko, R.).

International Workshop “Language Technologies for Digital Humanities and Cultural Heritage” within International Conference RANLP’2011, 16 September 2011, Hissar, Bulgaria (Survey on Current State of Bulgarian-Polish Online Dictionary, authors: Dimitrova, Ludmila, Dutsova, Ralitsa, Panova, Rumiana)

First International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage DiPP 2011, 11-14 September 2011, Veliko Tarnovo, Bulgaria (Language Resources – a Part of World Cultural Heritage, author: Dimitrova, Ludmila)

First International Conference on Digital Presentation and Preservation of Cultural and Scientific Heritage DiPP 2011, 11-14 September 2011, Veliko Tarnovo, Bulgaria (Information Technologies for the Preservation of Language Heritage, authors: Dimitrova, Ludmila, Dutsova, Ralitsa, Panova, Rumiana)

First International Conference on Digital Preservation and Presentation of Cultural and Scientific Heritage, September 11-14, 2011, Veliko Tarkovo, Bulgaria (Online Access to the Encyclopaedia Slavica Sanctorum, authors: Goynov, M., D. Paneva-Marinova, M. Dimitrova).

First International Conference on Digital Preservation and Presentation of Cultural and Scientific Heritage, September 11-14, 2011, Veliko Tarkovo, Bulgaria (Business Modeling of the Application Architecture of the Bulgarian Folklore Artery, authors: Paneva-Marinova, D., K. Rangochev, M. Goynov)

International Conference on e-Learning and the Knowledge Society (E-Learning’11), 26 August, 2011, Bucharest, Romania (Educational Application of top of Digital Library for Cultural Heritage, authors: Paneva-Marinova, D., R. Pavlov)

First International Conference on Digital Preservation and Presentation of Cultural and Scientific Heritage, September 11-14, 2011, Veliko Tarkovo, Bulgaria (Digital Libraries and Portals Saving National Cultural Heritage (IMI-BAS Experience) (Invited talk), authors: Pavlov, R., D. Paneva-Marinova)

First International Conference “Digital Preservation and Presentation of Cultural and Scientific Heritage, September 11-14, 2011, Veliko Tarkovo, Bulgaria (Survey of Existing Services in the Mathematical Digital Libraries and Repositories in the EuDML Project, authors: Pavlov, R., D. Paneva-Marinova, G. Simeonov)

16th Annual Media and Web Technology Conference EUROMEDIA’2011, London, April 2011 (An Approach to Learning-By-Doing through User Creation of Learning Content, authors: Dochev D., G. Agre, R. Pavlov)

CompSysTech 2011, Vienna, June 2011 (User Authoring in Learning-by-Doing Situations, authors: Dochev D., G. Agre, R. Pavlov)

 

Presentations at international conferences 2010

International Conference on Computer Systems and Technologies (CompSysTech’10), 2010, Sofia, Bulgaria (Towards Online Accessibility of Valuable Phenomena of the Bulgarian Folklore Heritage, authors: Pavlov, R., D. Paneva-Marinova, K. Rangochev, M. Goynov, D. Luchev)

European Conference on Information Warfare. Thessaloniki, Greece, 2010 (Zero-Sum Games of Deception, author: Braynov, S.)

International Conference on e-Learning and the Knowledge Society, 25-27 August, 2010, Riga, Latvia (Use Case for Creative Learning-by-Authoring, authors: Draganov, L., D. Paneva-Marinova, L. Pavlova-Draganova, R. Pavlov)

3rd International Euro-Mediterranean Conference on Digital Heritage (EuroMed 2010), 8-13 November 2010, Lymassol, Cyprus (Digital Library for Bulgarian Traditional Culture and Folklore, authors: Paneva-Marinova, D., R. Pavlov, K. Rangochev)

International Conference on Information Research and Applications (ITA 2010), 2010, Varna, Bulgaria (Search and Administrative Services in Iconographical Digital Library, authors: Paneva-Marinova, D., R. Pavlov, M. Goynov, L. Pavlova-Draganova, L. Draganov)

3rd International Euro-Mediterranean Conference on Digital Heritage (EuroMed 2010), 8-13 November 2010, Lymassol, Cyprus (On the Wider Accessibility of the Valuable Phenomena of Orthodox Iconography through Digital Library, authors: Pavlova-Draganova, L., D. Paneva-Marinova, R. Pavlov, M. Goynov)

International Conference on Information Research and Applications (ITA 2010), 2010, Varna, Bulgaria (Linguistics Research and Analysis of the Bulgarian Folklore. Experimental Implementation of Linguistic Components in Bulgarian Folklore Digital Library, authors: Rangochev, K., M. Goynov, D. Paneva-Marinova, D. Luchev)

 

Presentations at international conferences 2009

Fifth International Conference NLP, Corpus Linguistics, Corpus Based Grammar Research. Smolenice, Slovakia, 25-27 November 2009 (From Electronic Corpora to Online Dictionaries (on the example of Bulgarian Language Resources, author: Dimitrova, L.)  

International Workshop “Multilingual resources, technologies and evaluation for Central and Eastern European languages” in conjunction with International Conference RANPL’2009. Borovec, Bulgaria, 17 September 2009 (Bulgarian-Polish-Lithuanian Corpus–Current Development, authors:  Dimitrova, L., Koseska, V., Roszko, D., Roszko, R.)

MONDILEX Third Open Workshop, Bratislava, 15–16 April 2009 (Towards a Consistent Morphological Tagset for Slavic Languages: Extending MULTEXT-East for Polish, Ukrainian and Belarusian», authors: Kotsyba, N., Derzhanski, I.)

MONDILEX Fifth Open Workshop, Ljubljana, 14–15 October 2009 (Integrating the Polish Language into the MULTEXT-East Family: Morphosyntactic Specifications, Lexicon and Corpus», authors: Kotsyba, N., Radziszewski, A., Derzhanski, I.)

Open Conference on New Technology Platforms for Learning – Revisited. Budapest, Hungary, January 2009 (Development of a Courseware on Bulgarian Iconography for Ubiquitous On-demand Study, authors: Paneva-Marinova D., L. Pavlova-Draganova, L. Draganov, R. Pavlov, M. Sendova).

 

Presentations at international conferences 2008

Workshop on Lexicographic Tools and Techniques, Moscow, 3–4 October 2008 (The Category of Predicatives in the Light of the Consistent Morphosyntactic Tagging of Slavic Languages, authors: Derzhanski, I., N. Kotsyba)

MONDILEX Open Workshop “Lexicographic Tools and Techniques”, Moscow, 3–4 October 2008 (The significance of entry classifiers in digital dictionaries, authors: Dimitrova, L., V. Koseska – Toszewa)

MONDILEX Open Workshop “Lexicographic Tools and Techniques”, Moscow, 3–4 October 2008 (Compatibility of Slavic Language Resources, authors: Dimitrova, L., R. Pavlov)

14th International Conference on Virtual Systems and Multimedia, Limassol, Cyprus, 20-25 October 2008 (Cross-media and Ubiquitous Learning Applications on Top of Iconographic Digital Library, authors: Pavlov, R., D. Paneva-Marinova, L. Pavlova-Draganova, M. Sendova)

18th International Congress of Linguists, Seoul. 2008 (Similarities between geographically distant languages: the case of Kaingang and Oceanic, author: Pericliev, V.)

Slovo: Towards a Digital Library of South Slavic Manuscripts, Sofia, 2008 (Knowledge Technologies and Digital Libraries for Presentation of Bulgarian Folklore Heritage, authors: Rangochev, K., D. Paneva, D. Luchev)