ERIH PLUS – European Reference Index for the Humanities:
https://dbh.nsd.uib.no/publiseringskanaler/erihplus/about/index
CEEOL – Central and Eastern European Online Library:http://www.ceeol.com/
Ulrich's Periodicals Directory: https://ulrichsweb.serialssolutions.com/login
RISC – Russian Science Citation Index:https://elibrary.ru/defaultx.asp