BVS- Biblioteca Virtual de Saúde em Enfermagem, Portugal
CLACSO – Rede de Bibliotecas Virtuais de Ciências Sociais da América Latina do Caribe
DOAB – Directory of Open Access Books
IDEAS and Research Papers in Economics
OICRF – International Office of Cadastre and Land Records
Open Access Theses and Dissertations
PubMed Central – Biblioteca Digital de Medicina
Redalyc – Red de Revistas Científicas de América Latina y el Caribe, España y Portugal
SIL – SUMMER INSTITUTE OF LINGUISTICS
E-books do Centro de Estudos Judiciários
BASE: Bielefeld University Library
CiteSeer – Scientific Literature Digital Library
CULTIVAR – Cadernos de análise e prospetiva
DBLP Computer Science BibliographyBLP Computer Science Bibliography
Eldis Gateway to Development Information
E-journal – Universidad Nacional Autonoma de Mexico
Hindawi Publishing Corporation
PLoS – Public Library of Science