CiteSeer Autonomously creates citation indexes of scientific literature. Generates citation statistics and allows easy browsing of the context of citations. Texts freely available in PDF, PS, HTML format..
CiteSeer Search engine for computer science and related matters. For all results number of citations are given which allows to estimate the importance of a paper in a given context. Most of the papers are cached and available for direct download as postscript or PDF.
CiteSeer.ist E-print database of mathematics and science papers with citation information. Papers may be added by specifying the URL where their files reside.
CiteSeer: The NEC Research Institute Scientific Literature Digital Library Aims to improve the dissemination and feedback of scientific literature, and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness. Rather than creating just another digital library, CiteSeer provides algorithms, techniques, and software that can be used in other digital libraries. CiteSeer indexes Postscript and PDF research articles on the Web, and provides a number of special features.
ISI Highly Cited A search tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades.