@book{49379,
	author = {Chavira, Enrique. and Falcón, Nelson.},
	title = {Estrellas variables eruptivas en el halo galáctico /},
	publisher = {Universidad del Zulia,},
	year = {2005.},
	address = {Maracaibo :},
	url = {https://elibro.net/ereader/politecnicointernacional/16530}
}