Are two heads better than one?: object-focused work in physical and in virtual environments.

Ilona Heldal Maria Spante Mike Connell Are two heads better than one?: object-focused work in physical and in virtual environments. 287-296 2006 conf/vrst/2006 VRST http://doi.acm.org/10.1145/1180495.1180553 db/conf/vrst/vrst2006.html#HeldalSC06