1. Heilig M L. Sensorama simulator. US Patent 3 050 870, 1962-08-28
2. Sutherland I E. The ultimate display. In: Proceedings of the International Federation of Information Processing (IFIP) Congress, 1965. 506–508
3. Fisher S S, Humphries J, McGreevy M, et al. The virtual environment display system. In: ACM Workshop on Interactive 3D Graphics. New York: ACM Press, 1986. 77–87
4. Foley J D. Interfaces for advanced computing (cover story). Sci Am Mag, October 1987
5. Michael H. Metaphysics of Virtual Reality. Oxford: Oxford University Press, 1993