@booklet {Pellens2006, title = {State of the art in Designing Virtual Reality Applications}, year = {2006}, publisher = {Vrije Universiteit Brussel, Universiteit Hasselt}, type = {IWT SBO VR-DeMo (IWT 030248), State-of-the-art Report}, address = {Belgium}, author = {B. Pellens and F. Kleinermann and De Troyer, O. and J. De Boeck and E. Cuppens and De Weyer, T. and K. Coninx} }