LA-WEB 06 proceedings : Fourth Latin American Web Congress : October 25-27, 2006, Universidad de las Americas Puebla, Cholula, Mexico / edited by J. Alfredo Sanchez ; sponsored by SMCC--Sociedad Mexicana de Ciencia de la Computacion, CIRIA--Interactive Center of Information and Learning Resources (UDLA), ICT--Laboratory of Interactive and Cooperative Technologies (UDLA). - Sanchez, Alfredo, 1962- (IEEE Computer Society, 2006)