] Google Scholar enables you to search specifically for
] scholarly literature, including peer-reviewed papers,
] theses, books, preprints, abstracts and technical reports
] from all broad areas of research. Use Google Scholar to
] find articles from a wide variety of academic publishers,
] professional societies, preprint repositories and
] universities, as well as scholarly articles available
] across the web.

For anybody who has to do literature searches, this rules!

Google Scholar