Scopus is the largest abstract and citation database of peer-reviewed literature and quality web sources from all subjects. Scopus processes about 27,000 peer-reviewed journals from more than 7,000 publishers,

The database contains nearly 250,000 book titles and 47 million patent records from five patent offices. Scopus also offers information on articles that are only printed in the press. Scopus creates and automatically updates the profiles of scientists and authors of scientific publications, thus improving the quality of the citation analysis performed.

The database is updated daily, the retrospective dates back to 1788, references are included on record back to 1970.

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