Global Index Medicus http://www.globalhealthlibrary.net/php/index.php
LILACS http://lilacs.bvsalud.org/en/
LiSSa http://www.lissa.fr/dc/#env=lissa
Open Grey repository http://www.opengrey.eu/?lang=en
ORBI (ULg) http://orbi.ulg.ac.be/
PubMed https://www.ncbi.nlm.nih.gov/pubmed
RBMFC https://rbmfc.org.br/rbmfc
Scientific Electronic Library Online http://www.scielo.org/php/index.php