@book{29194,
	author = {Placencia Valero, Job,},
	title = {Una mirada al universo :},
	publisher = {Editorial Tébar,},
	year = {2006.},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/13713/}
}