@book{77894,
	author = {Velásquez Sabogal, Paúl Marcelo,},
	title = {Estudios sobre una superficie en movimiento :},
	publisher = {Editorial Universidad del Cauca,},
	year = {2018.},
	address = {Popayán :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/60600/}
}