@book{22904,
	author = {Eco, Umberto, 1932-2016},
	title = {Obra abierta:},
	publisher = {Editorial Seix Barral},
	year = {1965},
	address = {Barcelona},
	url = {https://direccionmultiple.files.wordpress.com/2012/08/eco_umberto-obra_abierta.pdf}
}