E. Jensen, S. Beitzel, O. Frieder, and A. Chowdhury. Special interest tracks and posters of the 14th international conference on World Wide Web, page 1176--1177. New York, NY, USA, ACM, (2005)
C. Paris, N. Colineau, and R. Wilkinson. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)