AGRIS-FAO: Food and Agriculture Organization
Bielefeld Academic Search Index
Directory for Medical Articles (ScopeMed)
Directory of Open Access Journals
Directory of Research Journals Indexing
DOI: Digital Object Identifier
Eurasian Scientific Journal Index
International Institute of Organized Research (I2OR)
National Center for Biotechnology Information Search database (NCBI)
OAJI: Open Academic Journals Index
ResearchBIB: Academic Resource Index
ROAD: Directory of Open Access Scholarly Resources
Sobiad: Sosyal Bilimler Atıf Dizini
TROVE: National Library of Australia