A virtual 3D mobile guide in the INTERMEDIA project. - Nadia Magnenat-Thalmann; Achille Peternier; Xavier Righetti; Mingyu Lim; George Papagiannakis; Tasos Fragopoulos; Kyriaki Lambropoulou; Paolo Barsocchi; Daniel Thalmann (Vis. Comput., 2008)