Scopus

Interdisciplinary bibliographic and abstract database in the field of mathematics and natural sciences, technical, medical, social and humanities. Contains about <b><a href=https://www.elsevier.com/?a=91122>41.000 journals</a></b> (including over <b>5.000 Open Access</b>), 240.000 books, 1521 book series, over 9 million conference paper and over <b>28 million patents</b>.