George G. Robertson Maarten van Dantzich Daniel C. Robbins Mary Czerwinski Ken Hinckley Kirsten Risden David Thiel Vadim Gorokhovsky The Task Gallery: a 3D window manager. 494-501 2000 CHI http://doi.acm.org/10.1145/332040.332482 db/conf/chi/chi2000.html#RobertsonDRCHRTG00