@book{928,
	author = {Denis-Papin, M. and Kaufmann, A.},
	title = {Ejercicios de cálculo operacional :},
	publisher = {Urmo,},
	year = {1971},
	address = {Bilbao:},
	note = {trad. por J.L. Prevost Lorenzo ; rev. por J. Pérez Vilaplana}
}