@book{98694,
	author = {Ferrer Beltrán, Jordi, and Rodríguez, Jorge L.},
	title = {Jerarquías normativas y dinámica de los sistemas jurídicos /},
	publisher = {Marcial Pons,},
	year = {2011.},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/127432/}
}