Searchable database contains bibliographic information, abstracts, reviews, and the full-text for articles published in ACM periodicals and proceedings since 1947.
Large multidisciplinary search engine with results ranking and previews. Google Scholar indexes scholarly literature including journal articles. *Note: free public access available at http://scholar.google.com/
Multidisciplinary index to scholarly and authoritative articles. Provides access to all three parts of the Citation Index: Arts and Humanities, Social Science and Science. Search by subject, author, journal title. Cited Reference Search finds articles that cite an author or article that you specify.