César A. Collazos Cristian Rusu José L. Arciniegas Silvana Roncagliolo Designing and Evaluating Interactive Television from a Usability Perspective. 381-385 2009 ACHI http://dx.doi.org/10.1109/ACHI.2009.22 conf/achi/2009 db/conf/achi/achi2009.html#CollazosRAR09