@conference {cVidal98,
	title = {Autentificacion digital de imagen, marcado y detecci{\'o}n {\'o}ptimos},
	booktitle = {XIII Simposium Nacional de la Uni{\'o}n Cient{\'\i}fica Internacional de Radio},
	year = {1998},
	pages = {105{\textendash}106},
	isbn = {84-89654-12-3},
	author = {Vidal, J. and Elisa Sayrol and Lagunas, M.}
}
