• Base - Bielefeld Academic Search Engine
• Google Scholar
• Ulrich's Periodical Directory
• EZB - Elektronische Zeitschriftenbibliothek/Electronic Journals Library
• Cite Factor
• CrossRef
• MIAR - Matriz de Información para el Análisis de Revistas
• ZDB - Zeitschriftendatenbank
• OCLC WorldCat
• Road - Directory Of Open Access Scholarly Resources
• EuroPub Database
• LatinREV
• Latindex