Abstracting and indexing
ARIANTA
Bielefeld Academic Search Engine
BIOSIS (Web of Science, Clarivate Analytics)
Chemical Abstracts CAS
Directory of Open Access Journals (DOAJ)
EBSCO
Electronic Journals Library (EZB)
Free Medical Journals
Genamics/JournalSeek
Harvard Libraries - University of California Libraries
Harvard Libraries HOLLIS
Hinari
International Committee of Medical Journal Editors (ICMJE)
J-Gate
Microsoft Academic
OhioLINK
POL-index
Polish Ministry of Science and Higher Education (PMSHE)
Polish Medical Library (GBL)
Polish Scientific Journal Database PubMed
PubMed (PMC)
RedLink
ROAD Directory of Open Access scholarly Resources
SCOPUS
SHERPA/RoMEO
Swiss University Library Network (RERO)
WorldCat