@book{4384,
	author = {Abril, Juan Carlos},
	title = {Modelos para el análisis de las Sierres de Tiempos},
	publisher = {Ediciones Cooperativas},
	year = {2004},
	address = {Buenos Aires :},
	url = {https://www.biblioeco.unsa.edu.ar/pmb/images/libros/L127528.jpg}
}