@book{31251,
	author = {León, Manuel de, and Timón, Ágata,},
	title = {La engañosa sencillez de los triángulos :},
	publisher = {Catarata,},
	year = {[2017]},
	series = {Colección Miradas matemáticas ;},
	address = {Madrid :},
	url = {https://elibro.net/ereader/politecnicointernacional/234159}
}