PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM). In keeping with NLM's legislative mandate to collect and preserve the biomedical literature, PMC is part of the NLM collection, which also includes NLM's extensive print and licensed electronic journal holdings and supports contemporary biomedical and health care research and practice as well as future scholarship.
The purpose of HAL Theses is to facilitate the self archiving of thesis manuscripts, which are important documents for direct scientific communication between scientists. HAL Theses is actually a particular "environment" of HAL.
Érudit offre l'accès à de nombreuses collections de documents en sciences humaines et sociales : revues, livres et actes, thèses, rapports de recherche.
arXiv is a free distribution service and an open-access archive for 2,267,263 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Materials on this site are not peer-reviewed by arXiv.