BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Reeves, Leah M. P Principal Lai , Jennif P Principal Larson, James A. P Principal Oviatt , Sharon P Principal Balaji, T. S. P Principal Collings, Penny P Principal Cohen , Phil P Principal Kraal , Ben P Principal Martin, Jean-Claude P Principal Raman, Michael P Principal Guidelines For Multimodal User Interface Design Vol: 47 pp.57-59.; 28 cm. ; il