Maria-Cleci Martins, Rosina Weber. Modeling Preferences Online. In José Cordeiro, Vitor Pedrosa, Bruno Encarnação, Joaquim Filipe, editors, WEBIST 2005, Proceedings of the First International Conference on Web Information Systems and Technologies, Miami, USA, May 26-28, 2005. pages 255-269, INSTICC Press, 2005.