This paper describes a new virtual reality system designed to be small enough to be totally portable. It is a semiimmersive
interaction system based on a movable stereoscopic projection screen with a tracking system to capture the movement of the screen with respect to the virtual model. The system can be used for cooperative inspection of very complex computer-aided design environments, allowing very simple interaction among users and designers at distant locations.
Fairén, M.; Brunet, P.; Techmann, T. MiniVR: a portable virtual reality system. "Computers and graphics (UK)", Abril 2004, vol. 28, núm. 2, p. 289-296.