Engine Address EN FR
BU Library internal platform X X
HAL hal.archives-ouvertes.fr X X
Google Scholar scholar.google.com X X
Microsoft Academic academic.microsoft.com X X
CORE core.ac.uk X X
BASE base-search.net X X
Science.gov science.gov X
Semantic Scholar semanticscholar.org X X
Refseek refseek.com X X
Science Direct sciencedirect.com X X
PubMed pubmed.ncbi.nlm.nih.gov X
UN Digital Library digitallibrary.un.org X X
TRID trid.trb.org X X
Google Google.com keyword+filetype:pdf X X
ECDC ecdc.europa.eu/en/publications-data X
WHO through google.com: keyword+site:who.int filetype:pdf X X
The National Academies nationalacademies.org X