ResearchGate is a network dedicated to science and research. Connect, collaborate and discover scientific publications, jobs and conferences. All for free.
Europe PubMed Central (Europe PMC) is an archive of life sciences journal literature.
PubMed comprises more than 22 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content...
Avicenna Journals (Advancements in Science) is a scientific publisher with 36 peer-reviewed, open access journals covering a wide range of academic disciplines.