★ Database of EBSCO, Massachusetts, USA

★ InfoBase Index
★ Chemical Abstracts Service (CAS), USA
★ Database of Cambridge Science Abstracts (CSA), USA
★ Database of Hein Online, New York, USA
★ Ulrich’s Periodicals Directory, USA
★ Universe Digital Library S/B, Proquest
★ Chinese Database of CEPS, American Federal Computer Library center (OCLC), USA
★ China National Knowledge Infrastructure, CNKI, China
★ Chinese Scientific Journals Database, VIP Corporation, Chongqing, China
★ IndexCopernicus, Index Copernicus International S.A., Poland
★ Google Scholar (scholar.google.com)

★ Google Scholar Metrics
★ Polska Bibliografia Naukowa (PBN), Poland
★ J-Gate

★ RoMEO
★ Electronic Journals Library
★ AcademicKeys
★ CiteFactor (USA)
★ getCITED
★ Newjour
★ Scientific Indexing Services
★ INNO SPACE
★ SJournals