Online databases::
Full–text databases:
NATIONAL SUBSCRIPTION 2009 - 2011
Databases could be accessed through the University Computer Network. The access is done by IP address and via Proxy server for some of the databases.

Elsevier databases:
- ScienceDirect
A full-text database with over 2500 journals and 6000 books in the following fields: Physical Sciences and Engineering – Chemical Engineering, Chemistry, Computer Science, Earth Science, Physics and Astronomy, Mathematics, Engineering Science; Life Sciences – Agricultural Science, Biology, Biochemistry, Genetics and Molecular Biology, Environmental Science, Immunology and Microbiology, Neurology; Health – Medicine and Dentistry, Public Health, Pharmacology, Toxicology and Pharmacy, Veterinary Science and Veterinary Medicine; Social Science and Humanities– Arts and Humanities, Business, Business Management and Accounting, Economics, Econometrics and Finance, Psychology, Social Sciences. List of subscribed titles. ScienceDirect Interactive Tutorials Menu: (EN)
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- Scopus
Scopus’ unique database contains abstracts and references from more than 15,000 peer-reviewed journals ensuring broad interdisciplinary coverage. It covers: Social Sciences – 3400 titles; Medicine – 5300 titles (100% coverage of Medline); Physics– 5500 titles; Social Sciences– 2850 titles. From 2009 a new subject area Arts & Humanities will be added, which includes 1 250 new titles in the field of Education, Anthropology, Sociology & Political Science, Philology, Music, Archeology, Languages and Linguistics, Religious Studies, Philosophy, Cultural Studies, Visual & Performing Arts, Classics, History, Literature and Literary Theory, etc.
SCOPUS User’s Guide: (BG); SCOPUS brochure: (BG); SCOPUS Interactive Tutorials Menu: (EN).
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- EMBASE.COM
Research references database in the field Biology, Biomedicine and Pharmacy, containing over 11 million records from 1974 to present. It indexes over 5000 biomedical journals from more than 70 сcountries.
EMBASE.COM User Guide: (EN)
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ISI Web Of Knowledge databases – The national subscription for THOMSON REUTERS – ISI WEB OF KNOWLEDGE platform includes the following databases:
- Web of Science
Web of Science provides access to the world’s leading citation databases in the field of Natural & Social Science, Arts & Humanities, as well as conference proceedings.
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Science Citation Index Expanded (1985-present)
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Social Sciences Citation Index (1985-present)
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Arts & Humanities Citation Index (1985-present)
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Conference Proceedings Citation Index- Science (1990-present)
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Conference Proceedings Citation Index- Social Science & Humanities (1990-present)
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- Derwent Innovations IndexSM (1963-present)
Patent information from the databases Derwent World Patent Index® & Patents Citation Index®. Subscription of:
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Chemical Section (1963-present)
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Electrical and Electronic Section (1963-present)
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Engineering Section (1963-present)
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- Biological Abstracts® (1985-present)
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A leading source of life sciences information – from Botany and Microbiology to Pharmacology.
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- MEDLINE® (1950-present)
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MEDLINE provides authoritative medical information on medicine, nursing, dentistry, veterinary medicine, the health care system, pre-clinical sciences, and much more. Created by the US National Library of Medicine.
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- Journal Citation Reports® (2007-2007)
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Journal Citation Reports® offers a systematic, objective means to critically evaluate the world's leading journals, with quantifiable, statistical information based on Science Citation Index и Social Science Citation Index citation data. By compiling articles' cited references, JCR Web helps to measure research influence and impact at the journal and category levels, and shows the relationship between citing and cited journals.
Main fields of bibliometric analysis are: Impact Factor, Immediacy Index, Cited Half Life and Citing Half Life. Subscription to:
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JCR Social Sciences Edition (2007)
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JCR Science Edition (2007)
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ISI Web of Knowledge Instruction: (BG); EndNote Web® - Quick Guide (BG); ISI Web of Knowledge Recorded Training: (EN)

ProQuest database
- ProQuest Central
ProQuest Central is the largest aggregated full-text database in the market today totaling more than 12,665 titles—with over 9,745 titles in full text (1905 to present). It serves as the central resource for researchers at all levels in all markets. It covers over 160 subjects including core subject areas such as Business and Economics, Health and Medicine, News and World Affairs, Science, Education, Technology, Humanities, Social Sciences, Psychology, Literature, Law, Women's Studies, and more. It also provides access to information not available in other aggregated resources such as over 400 full text U.S., Canadian and international newspapers, including access to the full text of The Wall Street Journal and Los Angeles Times; nearly 30,000 full text dissertations in different areas and concise business information from nearly 9,000 market reports across 43 industries in 40 countries.
ProQuest Support Center: (EN)
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UNIVERSITY LIBRARY SUBSCRIPTION DATABASES FOR 2010
- JSTOR
The use of the database is possible by IP-address, with Proxy Server.
JSTOR includes archives of over one thousand leading academic journals. The most recently published issues (past 3-5 years) are generally not available. The collection contains over 1300 journal titles divided into separate disciplinary clusters:
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All the 7 Arts & Sciences Collections – clusters in the field of Arts, Humanities and Social Science.
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Life Sciences – the largest JSTOR collection with over 5.5 million pages and scheduled to grow to more than 7 million
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- Emerald Management Xtra
The use of the database is possible by IP-address, with Proxy Server.
The largest and comprehensive online collection of peer-reviewed journals in management, to support librarians, students, researchers and heads of faculties/departments.
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- Journals of the American Chemical Society
The use of the database is possible by IP-address, with Proxy Server.
The Journal of the American Chemical Society, founded in 1879, is the flagship journal of the American Chemical Society and the preeminent journal in the field. This periodical is devoted to the publication of fundamental research papers in all areas of chemistry and publishes approximately 16,000 pages of Articles, Communications, Book Reviews, and Computer Software Reviews a year. Published weekly, JACS provides research essential to the field of chemistry.
The most cited journal in chemistry, the Journal of the American Chemical Society (JACS) received 318,252 total citations and an increase in ISI Impact Factor of 8.091, while publishing more articles (3242) than any other journal in the category as reported in the 2008 Journal Citation Reports® by Thomson Reuters.
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- Kluwer Law International Journals
The use of the database is possible by IP-address, with Proxy Server.
Full-text online database providing up to date information in the field of Law. Includes 21 full-text journals.
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- Ebsco Host Research Databases
The use of the database is possible by IP-address, without Proxy Server.
EBSCO Host Research Databases includes 11 databases. More...
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- SpringerLink
The use of the database is possible by IP-address, with Proxy Server.
SpringerLink is one of the world's leading interactive databases for high-quality scientific, technical, and medical journals, book series, books, reference works and the Online Archives Collection. SpringerLink is a powerful central access point for researchers and scientists.
The University Library “St. Kliment Ohridski” is a registered subscriber to SpringerLink’s full-text electronic journals. For the other types of online resources SpringerLink offers free access to bibliographic descriptions, tables of content and abstracts.
List of licensed material.
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- IEEE Computer Society Digital Library
The use of the database is possible by IP-address, with Proxy Server.
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Abstract databases. Cited reference databases.
- ВИНИТИ database
Interdisciplinary resources. This is the largest Russian database in the Natural, Exact and Technical Sciences. It contains 20 million documents in a Chronological Order – since 1972.
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Free online information resources
- Bank of Finland’s Institute for Economies in Transition – BOFIT
Free Online Information Resources in the field of Economics
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- Biointerphases Open Access Journal
Interdisciplinary Platform for Scientific Exchange Among the Biology, Chemistry, Physics, and Materials Sciences Communities.
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- BiologyBrowser
Free Portal of Thomson Reuters
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- DOAJ
Directory of free, full-text journals.
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- ECHO – European Cultural Heritage Online
Open Access Infrastructure for a Future Web of Culture and Science.
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- ECLAS
Online Catalogue of the libraries of the European Commission.
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- The European Library
Pan European Internet Portal
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- EUR-Lex
Free Access to European Union Law
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- ERIC
Online Digital Library for Education Resources
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- HighWire Press – Stanford University
The Largest Archive for Free Full-Text Articles
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- Index Translationum
International Bibliography of UNESCO Translations from 1979 -
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- KVK – Karlsruher Virtueller Katalog
- LiterNet
Bulgarian Directory for Literature and Humanities
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- Research Gate
The leading professional network ResearchGATE for scientists and researchers from all over the world. ResearchGATE search in publication metadata combines resources from its member profiles with those of other universities and institutes and provides information on relevant publications related to your research focus.
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- UNBISnet
Online Bibliography Information of UN
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- Scientific Electronic Library Online - SciELO
Selected collection of Brazilian scientific journals.
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- Scientific Journals International (SJI)
Archive of More than 100 Peer-reviewed Open-access Journals for all Disciplines
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- Scitopia
Free Federated Search Portal to the Digital Libraries of Leading Science and Technology Societies
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- WorldCat
Off-line database:
- ERIC
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Contents: It has bibliographical records with reviews, selected from journals and scientific papers or from reports of research in the field of education and related disciplines.
Range in UL: 1984 - 1995
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- POLTOX
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Contents : Cites published materials about pollution and toxicology as well as the noxious influence of toxic substances on plants, animals and men.
Range in UL: 1966 - 1994
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- SCIENCE CITATION INDEX
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Contents: It covers over 100 scientific disciplines from the Natural Sciences presented with over 3 300 leading journals from 1995 the database records abstracts.
Range in UL: 1993 г. - 1997 г.
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- SOCIAL SCIENCE INDEX
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Contents: Cites articles from over 350 journals in following fields: Anthropology, Health Care, Criminology, Economics, Ethnology, Gerontology, Geography, International Relations, Political Psychiatry, Psychology, Sociology etc.
Range in UL: 1983 - 1993 г.
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- WILSON HUMANITIES ABSTRACTS
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Contents:Cites articles from over 350 journals in the following fields: Archaeology, Folklore, Photography, History, Journalism, Philology, Politics, Music, Philosophy, Religion and Theology.
Range in UL: 1984 - 1994 г.
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- CETEDOC LIBRARY OF CHRISTIAN LATIN TEXTS
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In two volumes : 1. Patres latini - Biblia; 2. Medii Aeui Scriptores
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