Miguel Elias M. Campista, Igor M. Moraes, Pedro Miguel Esposito, Aurelio Amodei Jr., Daniel de Oliveira Cunha, Luís Henrique M. K. Costa, Otto Carlos M. B. Duarte. The ad hoc return channel: a low-cost solution for Brazilian interactive digital TV. IEEE Communications Magazine, 45(1):136-143, 2007. [doi]
Abstract is missing.