Google-based Impact Factor (2018): 9.98

h-index (August 2018): 20

i10-index (August 2018): 60

h5-index (August 2018): 15  

h5-median(August 2018): 20

(The data was calculated based on Google Scholar Citations. Click Here to Learn More. )

• AcademicKeys
• CNKI Scholar
• Education Resources Information Center (ERIC)
• Elektronische Zeitschriftenbibliothek (EZB)
• Google Scholar
• JournalSeek
• LOCKSS
• MIAR
• Open Access Journals Search Engine(OAJSE)
• Open J-Gate
• PKP Open Archives Harvester
• SHERPA/RoMEO
• Ulrich's
• WorldCat