B. Sigurbjörnsson, and R. van Zwol. WWW '08: Proceeding of the 17th international conference on World Wide Web, page 327--336. New York, NY, USA, ACM, (2008)
L. Specia, and E. Motta. Proc. of the European Semantic Web Conference (ESWC2007), volume 4519 of LNCS, page 624-639. Berlin Heidelberg, Germany, Springer-Verlag, (July 2007)