A. Aubel, M. Escher, F. Labrosse, J. Nebel, J. Gascuel, Gerd Hesina, Christian Faisstnauer, Francois Faure
Collaborative Animation over the Network.
IEEE Proceedings of Computer Animation 1999 (CA'99), 26-28 May, Geneva, Switzerland, 1999.

Anton Fuhrmann, Gerd Hesina, Michael Gervautz, Francois Faure
Occlusion in collaborative augmented environments
Proceedings of the 5th EUROGRAPHICS Workshop on Virtual Environments (EGVE 1999), Vienna, June 1-2, 1999.

Anton Fuhrmann, Gerd Hesina, Michael Gervautz, Francois Faure
Occlusion in collaborative augmented environments (extended version). 
Computers & Graphics 23 (1999) pp.809-819, Oxford, 1999.

Anton Fuhrmann, Gerd Hesina, Francois Faure, Michael Gervautz
Occlusion in Collaborative Augmented Environments
TR-186-2-98-29, December 1998 [paper]