★ AcademicKeys
★ Bielefeld Academic Search Engine
★ Chinese Database of CEPS, Airiti Inc., Taiwan
★ Chinese Scientific Journals Database, VIP Corporation, Chongqing, P.R.C.
★ CiteFactor (USA)
★ Electronic Journals Library
★ getCITED
★ Google Scholar
★ INNO SPACE
★ J-Gate
★ LLBA database of CSA (Cambridge Scientific Abstracts), USA
★ Newjour
★ OCLC (Online Computer Library Center,Inc.), USA
★ Polish Scholarly Bibliography
★ Scientific Indexing Services
★ SJournals
★ Sjournals Index
★ Socol@r
★ Turkish Education Index
★ Ulrich’s Periodicals Directory
★ WorldCat

★ CNKI