1. Presence in virtual environments as a function of type of input device and display update rate;Barfield;Displays,1998
2. Put that where? Voice and gesture at the graphics interface;Billinghurst;Computer Graphics,1998
3. Bowman, D.A., 1999. Interaction techniques for common tasks in immersive virtual environments. Doctoral thesis. Georgia Institute of Technology.
4. An evaluation of techniques for grabbing and manipulating remote objects in immersive virtual environments;Bowman,1997
5. Burzio, L., Ferrino, M., Masali, M., 2003. Laptop Usability Analysis and Human Centred Design Working in Micorgravity. In: HAAMAHA Eighth, International Conference, 27–30 May, Rome, pp. 361/365.