2007 International Conference on Cyberworlds proceedings : HAPTEX 2007 Workshop, 24 October, 2007, Hannover, Germany : Cyberworlds 2007, 25-26 October, 2007, Hannover, Germany : NASAGEM 2007 Workshop, 27 October, 2007, Hannover, Germany / edited by Franz-Erich Wolter and Alexei Sourin ; supported by Leibniz Universitat Hannover. - Wolter, Franz-Erich; Sourin, Alexei (IEEE Computer Society, 2007)