@book{1763,
	author = {Hofstadter, Douglas R. and USABIAGA, MARIO A.},
	title = {Gödel, Escher, Bach : },
	publisher = {Tusquets Editores},
	year = {1998},
	series = {Colección Metatemas},
	address = {Barcelona},
	edition = {6 ed.}
}