Yvonne Jung Jens Keil Johannes Behr Sabine Webel Michael Zöllner Timo Engelke Harald Wuest Mario Becker Adapting X3D for multi-touch environments. 27-30 2008 Web3D http://doi.acm.org/10.1145/1394209.1394218 conf/vrml/2008 db/conf/vrml/web3d2008.html#JungKBWZEWB08