@book{1920,
	author = {Lukasiewicz, Jan.},
	title = {La silogística de Aristóteles},
	publisher = {Editorial Tecnos},
	year = {1977.},
	series = {Colección Estructura y función : El porvenir de la ciencia.},
	address = {Madrid},
	note = {Translation of : Aristotle's syllogistic.}
}