@book{90207,
	author = {Sagan, Carl, and Shklovskiĭ, I. S.,},
	title = {Vida inteligente en el universo /},
	publisher = {Editorial Reverté,},
	year = {[2021]},
	address = {Barcelona :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/103409/}
}