Google’s Journal Database
If you want to improve your desktop research with a more scientific approach but do not want to spend days in university libraries, try Google Scholar. It provides a simple way to broadly search for scholarly literature. You can search across many disciplines and sources and Google Scholar helps you find relevant work across the world of scholarly research. Currently it collects scholarly publications in 12 languages in 8 categories and also include US case law documents.
Elsevier’s Open Access Service
ScienceDirect is the science publisher Elsevier’s solution for researchers. It combines full-text scientific publications with smart free-text indexing and searching functionality. You can find there articles from over 3,800 journals and more than 35,000 book titles published not only by Elsevier. In addition to open access content the service includes various innovative approaches, like article rental or guest access.
Not only about Medicine
PubMed Central is a free archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health’s National Library of Medicine (NLM). PMC serves as a digital counterpart to NLM’s print journal collection. This is a repository for journal literature deposited by participating journals as well as for author manuscripts. PubMed Central provides its own reading interface for convenient access on various devices.