University library "St. Kliment Ohridski"


Archaeology, art history, cultural heritage
Full-text resources in German.
ICOMOS (International Council on Monuments and Sites) Open Archive
Repository of the International Council Monuments and Sites. 

Biology, biomedicine, health sciences
BioMed Central /BMC/ 
Open access to more than 300 peer-reviewed journals. The database is part of Springer Nature. 
Europe PMC 
Offers open access to more than 3.7 million full-text scientific articles  and to more than 31 million references.
Geneva Foundation for Medical Education and Research
Offers access to more than 100 full-text scientific journals.
Public Library of Science (PLOS) 
Offers open access to peer-review journals.

Full-text database with various resources for researchers and students.
Research Papers in Economics (RePEc) 
Decentralized bibliographic database maintained by volunteers from 100 countries. Consists information from more than 3000 journals.

Social Sciences
Social Science Open Access Repository (SSOAR) 
Consists of articles, books, dissertations, conference papers, book reviews and other scientific works added by the authors.

ERIC: Educational Resource Information Center 
Offers access to more than 1.5 million bibliographic records including references. The database consists full-text articles and gray literature as well.

Physics, astrophysics, geophysics
Astrophysics Data System 
Consists of more than 8 million full-text journals published in peer-review and non peer-review sources. The database is developed and maintained by NASA and the Harvard–Smithsonian Center for Astrophysics. 

Offers access to more than 2.4 million resources from journals, books, archives and private sites selected by scientists in philosophy.

Offers search by chemical structures, chemical and physical properties, patents, etc. Consists more than 97 million compounds, over 245 million substances, over 3 million patents and over 29 million scientific works.