Viviane André Antunes R. Wanderley Tatiana A. Tavares Pablo J. Alsina G. Lemos Luiz Marcos Gonçalves Playing with Robots and Avatars in Mixed Reality Spaces. 318-321 2004 conf/icinco/2004 ICINCO (2) db/conf/icinco/icinco2004.html#AntunesWTALG04