WorldCat
Electronic Journals Library
Scholarsteer
Journal Index
CiteFactor
Open Academic Journal Index
Scientific Indexing Services (SIS)
SHERPA/ROMEO
Directory of Research Journals Indexing
Efita
Research Bib
International Institute of Organized Research (I2OR)
Elektronische Zeitschriftenbibliothek (EZB)
JOUR INFORMATICS
PBN Polska Bibliografia Naukowa (Polish Scholarly Bibliography)
Global Society for Scientific Research (JIFACTOR)
Cosmos