CiteSeerX is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science. CiteSeerX aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge.

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Science Direct is the search engine for journals published by Elsevier, the world's largest publisher of peer-reviewed science, technical, and medical journals.

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Web of Science (WoS) indexes leading scholarly journals, books, proceedings, and other formats. Its major subject areas include the natural and social sciences and arts and humanities with coverage back to 1900. The heart of WoS is the Web of Science Core Collection, which indexes thousands of scholarly journals by author, author affiliation, and cited reference. In addition to the Core Collection, Web of Science provides access to several regional, subject, and format-specific database.

The suite of video tutorials teach aspects of searching, analyzing results, creating a researcher profile, and more. EndNote Web, the bibliographic management tool, is integrated into WoS.

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