Multimodal selection techniques for dense and occluded 3D virtual environments.

Lode Vanacken Tovi Grossman Karin Coninx Multimodal selection techniques for dense and occluded 3D virtual environments. 237-255 2009 67 Int. J. Hum.-Comput. Stud. 3 http://dx.doi.org/10.1016/j.ijhcs.2008.09.001 db/journals/ijmms/ijmms67.html#VanackenGC09