(The data was calculated based on Google Scholar Citations)

• Google-based Impact Factor (2018): 2.28
• h-index (December 2018): 31
• i10-index (December 2018): 304
• h5-index (December 2018): 22
• h5-median (December 2018): 27

• AGRICOLA
• AGRIS
• BASE (Bielefeld Academic Search Engine)
• CAB Abstracts
• CiteFactor
• CNKI Scholar
• CrossRef
• DESY Publication Database
• DTU Findit (DTU Library)
• Elektronische Zeitschriftenbibliothek (EZB)
• Excellence in Research for Australia (ERA)
• FindIt@Bham (UoB Library)
• Genamics JournalSeek
• Google Scholar
• HOLLIS (Harvard Library)
• Index Copernicus
• Infotrieve (Copyright Clearance Center)
• Jisc Library Hub Discover
• JournalTOCs
• Library of Congress
• LIVIVO (ZB MED)
• LOCKSS
• LSE Library
• Max Planck Institutes
• MIAR
• Norwegian Centre for Research Data (NSD)
• Open J-Gate
• OskiCat (UCB Library)
• PKP Open Archives Harvester
• Publons
• Qualis/CAPES
• ROAD
• SHERPA/RoMEO
• Southwest-German Union Catalogue
• Standard Periodical Directory
• Stanford Libraries
• StarPlus (UoS Library)
• Technische Informationsbibliothek (TIB)
• The Keepers Registry
• Trove
• UCR Library
• Ulrich's
• UniCat
• Universe Digital Library
• University Library (USask)
• WorldCat
• WRLC Catalog