@book{231948,
	author = {Alemañ Berenguer, Rafael Andrés,},
	title = {Relatividad para todos :},
	publisher = {Equipo Sirius,},
	year = {2009.},
	address = {Madrid :},
	edition = {Tercera edición.},
	url = {https://www.digitaliapublishing.com/a/8810/}
}