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SciELO is a bibliographic database and a model for cooperative electronic publishing in developing countries originally from Brazil. It contains 985 scientific journals from different countries in free and universal access, full-text format. Free FAPESP, CNPq and BIREME: Science.gov: Multidisciplinary
These sites allow you to search for articles that are entirely free to read. Find this article in BASE, a search engine for academic open online resources; Find this article in OAIster, a catalogue of open-access materials; Find this article at JURN, a curated search engine for free academic articles and books
CiteSeer's goal is to improve the dissemination and access of academic and scientific literature. As a non-profit service that can be freely used by anyone, it has been considered part of the open access movement that is attempting to change academic and scientific publishing to allow greater access to scientific literature.
Articles are free to read by visitors, however additional features (such as job postings or advertisements) are accessible only as a paid subscription. Members of the site each have a user profile and can upload research output including papers, data, chapters, negative results, patents, research proposals, methods, presentations, and software ...
Libre open access also refers to free online access, to read, free of charge, plus some additional re-use rights, [43] covering the kinds of open access defined in the Budapest Open Access Initiative, the Bethesda Statement on Open Access Publishing and the Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities.
While the format of publications have largely kept the constraints of the printing format, additional materials could be included in "supplementary information". [33] As a publication supplementary data files have an ambiguous status. In theory they are meant to be raw documents, giving access to the background of research.
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