Provides access to citations and full text articles from the biomedical literature (medicine, nursing, dentistry, veterinary medicine, health care, and the preclinical sciences). PubMed includes MEDLINE (mid 1960s-present), OLDMEDLINE (1950-1965), in-process citations (not yet indexed).
PubMed Central is a free digital archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM). PubMed Central preserves and maintains access to the electronic biomedical literature.
Scopus is an interdisciplinary, bibliographic database that indexes the contents of more than 15,000 journals in the physical sciences, engineering, earth and environmental sciences, life and health sciences, social sciences, psychology, business, and management.
Scopus also features cited references and can be searched for articles that cite a specific article.
Authoritative, multidisciplinary content covers over 10,000 of the highest impact journals worldwide, including Open Access journals and over 110,000 conference proceedings. You'll find current and retrospective coverage in the sciences, social sciences, arts, and humanities, with coverage available to 1900. Includes the Science Citation Expanded®, Social Sciences Citation Index®, and Arts & Humanities Citation Index™. Web of Science is especially useful for its citation linking.