Bastian Leibe Thad Starner William Ribarsky Zachary Wartell David M. Krum Justin Weeks Brad Singletary Larry F. Hodges Toward Spontaneous Interaction with the Perceptive Workbench. 54-65 2000 20 IEEE Computer Graphics and Applications 6 http://doi.ieeecomputersociety.org/10.1109/38.888008 db/journals/cga/cga20.html#LeibeSRWKWSH00