G. Tummarello, and C. Morbidoni. Workshop on Social and Collaborative Construction of Structured Knowledge
at 16th International World Wide Web Conference (WWW2007), (2007)
J. Freyne, R. Farzan, P. Brusilovsky, B. Smyth, and M. Coyle. IUI '07: Proceedings of the 12th international conference on Intelligent user interfaces, page 52--61. New York, NY, USA, ACM Press, (2007)