Abstracting and indexing

Academic Journals Database
Academic Search Complete
Bielefeld Academic Search Engine
BIOSIS (Web of Science, Clarivate Analytics)
Chemical Abstracts CAS
Directory of Open Access Journals (DOAJ)
EBSCO
Electronic Journals Library (EZB)
EMBASE
Free Medical Journals
Genamics/JournalSeek
Geneva Foundation Free Medical Journals
Google Scholar
Harvard Libraries - University of California Libraries
HINARI Access to Research
International Committee of Medical Journal Editors (ICMJE)
J-Gate
Microsoft Academic
NewJour
OhioLINK
Open Ukrainian Citation Index
Polish Ministry of Science and Higher Education (PMSHE)
Polish Medical Library (GBL)
ProQuest
PubMed Central (PMC)
RedLink
SCIRUS
SCOPUS
Swiss University Library Network (RERO)
Web of Science
WorldCat
ZETOC