Google Scholar

Access type
Google Scholar
Access to GS is free
Stand on the shoulders of giants
Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. Google Scholar helps you find relevant work across the world of scholarly research.
Coverage
articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.