@book {eTorres93,
	title = {Sistemas Anal{\'o}gicos y Digitales de Televisi{\'o}n},
	year = {1993},
	publisher = {Edicions UPC},
	organization = {Edicions UPC},
	address = {Barcelona},
	isbn = {84-7653-288-1},
	author = {Torres, L. and Lleida, E. and Casas, J.}
}
