Scopus
Harvard
Crossref
MIAR
Bielefeld Academic Search Engine (BASE)
Dardo
Directory of Open Access Scholarly Resources (ROAD)
EuroPub
Google Académico
Latindex Catálogo 2.0
Malena
Mir@bel
Periódicos de livre acesso (LivRe)
Scilit
WorldCat
Unpaywall
Wizdom
