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SAGE Open
SAGE Open is an open access publication from SAGE. It publishes peer-reviewed, original research and review articles in an interactive, open access format. Articles may span the full spectrum of the social and behavioral sciences and the humanities.
ScholarBank@NUS

Science Direct Open
The leading platform of peer-reviewed literature that helps you move your research forward. Science Direct let you discover more from over 2,500 scholarly journals, including over 250 fully Open Access publications and 39,000 reference books.
ScienceDirect
ScienceDirect is a platform which provides subscription-based access to a large database of scientific, technical, and medical research.
Scimago Journal & Country Rank
Scimago Lab has worked closely with international partners from the publishing realm, scientific information suppliers, universities and government agencies. As result of collaboration links with Elsevier, whom we jointly develop cutting-edge analysis tools, and evaluation concepts, it stands out the journal evaluation web environment SCImago Journal & Country Rank and the SIR Reports which analyses institution research performance across the world, both openly available.
Scopus
Scopus is a source-neutral abstract and citation database curated by independent subject matter experts. It places powerful discovery and analytics tools in the hands of researchers, librarians, institutional research managers and funders. Scopus generates precise citation search results and automatically updated researcher and institution profiles, creating richer connections between people, published ideas, and organizations. In addition to protecting the integrity of the scholarly record, Scopus helps bolster institutional research performance, rank and reputation.
Sin Chew Daily

SPIE. Digital Library [Advanced Photonics]
Co-published by SPIE and Chinese Laser Press, Advanced Photonics is a highly selective, open access, international journal publishing innovative research in all areas of optics and photonics, including fundamental and applied research.
SPIE. Digital Library [Journal of Biomedical Optics]
The Journal of Biomedical Optics (JBO) is an open access journal that publishes peer-reviewed papers on the use of novel optical systems and techniques for improved health care and biomedical research.
SPIE. Digital Library [Neurophotonics]
Neurophotonics is an open access journal covering advances in optical technology applicable to study of the brain and their impact on the basic and clinical neuroscience applications.
Spiral@Imperial College London

SPRINGER Open Access Books
Note: Free E Book from SPRINGER

SpringerLink
SpringerLink is a visionary information service created for the Internet by the science publisher Springer. It is divided according to field into the so-called Online Libraries of life sciences, chemical sciences, geosciences, computer science, mathematics, medical, engineering, law, environmental science, and economics.
SpringerNature - Novel Coronavirus

SpringerOpen
SpringerOpen journals and books are made freely and permanently available online immediately upon publication. They are subject to high-level peer review, author and production services ensuring quality and reliability of the work. Authors publishing with SpringerOpen retain the copyright to their work, licensing it under a Creative Commons license. To cover the cost of the publication process, all SpringerOpen journals and books charge an open access fee.
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