A comprehensive database with over 225+ million scholarly works, 127+ million global patent records, and more than 370 million biological sequences, all with unprecedentedly rich metadata (including citations).
The version of MEDLINE that the National Library of Medicine makes available for free, and contains a collection of newer articles that are not yet indexed and included in other versions of MEDLINE.
Get an overview of a research topic showing the main topic areas at a glance, and with citations provided for documents (some open access, some closed) related to each area.