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- ACM Digital Library
- American Chemical Society Journals
- Annual Reviews
- AIP - American Institute of Physics
- American Physiological Society
- American Society for Microbiology ASM
- ASME : American Society of Mechanical Engineers
- Aranzadi Proview
- Emerald
- Health & Medical Complete
- IEEE Xplore
- Institute of Physics
- JSTOR
- Laleydigital.es
- Nature
- New England journal of medicine
- Periodicals Archive Online
- PsycArticles
- Psychology Database
- Royal Society of Chemistry
- Sage
- Science
- ScienceDirect
- SpringerLinK
- Taylor and Francis
- World Scientific Publishing