American Mathematical Society database of abstracts of mathematics literature. Over 2.5 million brief authoritative reviews of mathematics papers and books from 1940 to present.
Zentralblatt MATH
European database of abstracts of mathematical literature. Over 3 million brief authoritative reviews of mathematics papers and books from 1868 to present.
Mathematics interface for the arXiv, a freely available digital library of over 750,000 preprint papers in physics, mathematics, statistics, computer science, quantitative biology, and quantitative finance, and statistics.
MPRESS: Mathematics Preprint Search System
European collections of preprint mathematics papers.
SpringerLink
Largest publisher of mathematics. Electronic access to book series, journals, and books published 2005 - present.
SIAM e-books
E-books on computational mathematics, optimization and control, probability and statistics, and mathematical methods for natural scientific fields.
Web of Science
Large bibliographic and citation database with records of tens of millions of published papers in science, social sciences, and humanities, and their citations.
American Institute of Physics bibliographic database of physics literature
Compendex/Engineering Village
Engineering bibliographic databases
Wikipedia's mathematics pages organized by subject
Online mathematics encyclopedia
AMS Journals :: Print and Electronic
American Mathematical Society journals.
Society for Industrial and Applied Mathematics journals
DML: Digital Mathematics Library: Retrodigitized Mathematics Journals ...
Historical mathematical journals and books, some as early as the 17th Century, with links to content in Göttinger Digitalisierungszentrum, NUMDAM, Russian Digital Mathematics Library, and other collections of historical mathematics.
Göttinger Digitalisierungszentrum: GDZ
German digital library of historical mathematics journals
NUMDAM :: Recherche et téléchargement d'archives de revues ...French digital library of historical mathematics journals
Cornell University Library Historical Monographs CollectionCornell University collection of over 500 historical mathematics books
