@book{90491,
	author = {Olivera Serrano, César,},
	title = {El libro de los bienhechores del monasterio de San Benito el Real de Valladolid :},
	publisher = {Dykinson,},
	year = {2021.},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/103857/}
}