★ Chinese Database of CEPS, Airiti Inc. & OCLC

★ Crossref
★ Chinese Scientific Journals Database, VIP Corporation, Chongqing, China
★ CSA Technology Research Database
★ Index Copernicus, Poland
★ Norwegian Social Science Data Services (NSD), Norway
★ Summon Serials Solutions
★ Ulrich’s Periodicals Directory

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