@book{28301, author = {Hofstadter, Douglas R., and Usabiaga Bandizzi, Mario Arnaldo,}, title = {Gödel, Escher, Bach :}, publisher = {Tusquets Editores, }, year = {1987. }, series = {: Divulgación}, address = {Barcelona :}, note = {Incluye bibliografía e índice analítico.} }