Academic Search Complete
Provides references to articles from scholarly journals and magazines. Full text is available for many articles.
General Science Abstracts (1984-)
Provides references to articles from mathematics journals.
Google Scholar
Provides references to scholarly books and articles.
JSTOR
Provides full text articles from academic journals.
OCLC Electronic Collections Online (1995-)
Provides references to articles from academic journals.
SpringerLink
Lists articles in SpringerLink journals. Includes some coverage of mathematics. Full text is available for most articles.
WorldCat
Provides references to books, videos, cds and other items in academic and public libraries.