@book{4451,
	author = {Jou, David and Hawking, Stephen},
	title = {El universo en una cáscara de nuez},
	publisher = {Crítica},
	year = {2010},
	address = {Barcelona :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L127655.jpg}
}