@book{101721,
	author = {Román García, Antonio, and Casanueva Sánchez, Isidoro C.,},
	title = {Derecho de contratos /},
	publisher = {Dykinson, S.L.,},
	year = {[2018]},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/131472/}
}