O. J. Calderón C., L. Gómez Figueroa, and J. A. Sandoval León, “Interactive Television Mechanisms in a Digital Television Environment and a Proposal of Interactivity Controled by Voice”, Entre cienc. ing., vol. 4, no. 8, pp. 128–147, Dec. 2010, doi: 10.31908/19098367.746.