@book{87242,
	author = {Knopp, Konrad. and Álvarez Ude, José Gabriel.},
	title = {Teoría de funciones / },
	editor = {Imp. Elzeviriana)},
	publisher = {Labor, },
	year = {1956 (},
	series = {Manuales técnicos Labor ; },
	address = {Madrid : },
	edition = {2ª ed., reimp.}
}