D. A. Bowman, Chen, J., Wingrave, C., Lucas, J., Ray, A., Polys, N. F., Li, Q., Haciahmetoglu, Y., Kim, J., Kim, S., Boehringer, R., and Ni, T.,
“New Directions in 3D User Interfaces”,
International Journal of Virtual Reality, vol. 5, pp. 3-14, 2006.