CiteSeerX (Research Index)
Citeseer (also known as Research Index) is a scientific digital library aimed primarily at computer scientists. It contains freely available, full-text research articles (journal pre-prints and papers where available, conference proceedings, technical reports) downloaded from the Web.
The articles are indexed by an Autonomous Citation Indexing (ACI) system which links the records together through references cited within, and citations made to, an article. It provides links to related articles and can identify the context of a citation (allowing researchers to see what their peers have said about the cited work). CiteSeer supports full Boolean, phrase and proximity searching. You can choose to search the full-text documents or the citations contained within these documents. (Please note, not all links to cited references will be available as full-text documents).
Pennsylvania State University