A. Patil, S. Oundhakar, A. Sheth, and K. Verma. Proceedings of the Thirteenth International World Wide Web Conference (WWW2004), New York, USA, LSDIS Lab, University of Georgia, (17-22 May 2004)
J. Lu, Y. Yu, and J. Mylopoulos. WIRI '05: Proceedings of the International Workshop on Challenges in Web Information Retrieval and Integration, page 240--247. Washington, DC, USA, IEEE Computer Society, (2005)