@book{22907,
	author = {Marin Velásquez, Yesid },
	title = {Zupay-Úroboros /},
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {2016.},
	address = {Bogotá (Colombia) :},
	url = {https://drive.google.com/drive/folders/1OWADx-_hRvJvQXMg23lK-3mHQj6jUlwv?usp=drive_link}
}