@book{48152,
	author = {Chamocho Cantudo, Miguel Angel,},
	title = {Alvar Pérez de Castro (c. 1196-1239) :},
	publisher = {Dykinson, S.L.,},
	year = {[2017]},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/50669/}
}