M. Cluts. GROUP '03: Proceedings of the 2003 international ACM SIGGROUP conference on Supporting group work, page 144-152. New York, NY, USA, ACM Press, (2003)
B. Marlin, S. Roweis, and R. Zemel. Proceedings of the Tenth International Workshop on Artificial Intelligence and Statistics (AISTATS), page 222--229. (2005)
M. Mudge, J. Voutaz, C. Schroer, and M. Lum. VAST2005: 6th International Symposion on Virtual Reality, Archeology
and Cultural Heritage. Incorporating: 3rd EUROGRAPHICS Worksop
on Graphics and Cultural Heritage, page 29--40. Eurographics Association, (2005)