Design of an Advanced Platform for Citizen Participation Committed to Ensuring Freedom of Speech. - Emilia Pérez Belleboni; Ana Gómez Oliva; Sergio Sánchez; Jose D. Carracedo; Justo Carracedo Gallardo; Carlos González; Jesús Moreno Blázquez (J. Theor. Appl. Electron. Commer. Res., 2006)