Expectations versus reality – Search engine features needed for Web research at mid 2005 Judit Bar-Ilan Department of Information Science, Bar-Ilan University,Israel
J. Ding, L. Gravano, and N. Shivakumar. Proceedings of the 26th Int. Conf. on Very Large Databases, VLDB 2000, page 545--556. Morgan Kaufmann Publishers Inc., (2000)