Web of Knowledge (formerly known as ISI Web of Knowledge) is an academic citation indexing and search service, which is combined with web linking and is provided by Thomson Reuters. Web of Knowledge covers the sciences, social sciences, arts and humanities. It provides bibliographic content and tools to access, analyze, and manage research information.
Palgrave Connect presents libraries with a flexible approach to building an ebook collection with over 14,000 titles offered in the Humanities, the Social Sciences and Business in 2015.
The Springer Link – Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.
LiterNet – Bulgarian specialized portal for Literature and Humanitarian science.
DOAJ – Free, full text, quality controlled scientific and scholarly journals, covering all subjects and many languages.
ECHO – European Cultural Heritage Online – European Cultural Heritage Online - Open Access Infrastructure for a Future Web of Culture and Science.
ECLAS – European Commission Libraries Catalogue.
The European Library – Huge cultural dataset, coming from European cultural and scientific institutions.
EUR-Lex – Access to European Union law.
ERIC – Education Resources Information Center – Online library with educational materials.
HighWire Press – Stanford University – largest free online full-text science archives.
International bibliography database, contains cumulative bibliographical information on books translated and published in about one hundred of the UNESCO Member States since 1979.
KVK – Karlsruher Virtueller Katalog – Meta search interface for more than 500 million books and serials in library and book trade catalogs worldwide.
Research Gate – The largest social network for scientists and researchers worldwide.
UNBISNET – Catalogue of United Nations(UN) documents and publications
SJI – Scientific Journals International – Publishes peer-reviewed open-access journals for all major disciplines.
WDL – World Digital Library – World digital library supported by UNESCO.
WorldCat – Global free online catalogue.
National Academic Library and Information System (NALIS) – Аccess to 2100735 bibliographic records of 27 libraries in Bulgaria.
Globethics – А global network of persons and institutions interested in various fields of applied ethics. It offers access to a large number of resources on ethics, especially through its leading global digital ethics library and facilitates collaborative web-based research, conferences, online publishing and information sharing.