Alex Ugarte Igor García Amalia Ortiz David Oyarzun User Interfaces Based on 3D Avatars for Interactive Television. 107-115 2007 conf/euroitv/2007 EuroITV http://dx.doi.org/10.1007/978-3-540-72559-6_12 db/conf/euroitv/euroitv2007.html#UgarteGOO07