Jérémy Boes Cédric Sanza Stéphane Sanchez Intuitive Method for Pedestrians in Virtual Environments. 117-137 2011 Intelligent Computer Graphics http://dx.doi.org/10.1007/978-3-642-22907-7_7 series/sci/2012-374 db/series/sci/sci374.html#BoesSS11