Scopus is the largest abstract and citation database of peer-reviewed research literature with more than 20,500 titles from more than 5,000 international publishers. Scopus offers researchers a quick, easy and comprehensive resource to support their research needs in the scientific, technical, medical and social sciences fields and arts and humanities.
Web of Science is a comprehensive interdisciplinary, bibliographic database with article references from journals, books, proceedings. An integrated web-based platform, the ISI Web of Science provides high-quality content and tools to access, analyze, and manage research information. It offers researchers the navigational and retrieval functions. Web of Science data coverage is over 20,000 peer-reviewed, high-quality scholarly journals published worldwide (including Open Access journals); over 190,000 conference proceedings; and over 90,000 editorially selected books.
Google Scholar is a useful and effective resource that allows you to search across a wide range of literature. It draws on information from journal publishers, university repositories, and other websites that it has identified as scholarly