Bowman, Douglas A ; Kruijff, E ; LaViola, Joseph J., Jr. Bowman, DA; Kruijff, E; LaViola, JJ; et al. "An introduction to 3-d user interface design," Presence: Teleoperators and Virtual Environments 2001, Vol. 10 No. 1, 96-108 doi:10.1162/105474601750182342.
,
2001