@book{7680,
	author = {Foncuberta, Juan},
	title = {Algebra :},
	publisher = {Conicet :},
	year = {1996.},
	series = {Red Federal de Formación Docente Continua},
	address = {Buenos Aires :},
	note = {p.63 Red Federal de Formación Docente Continua.}
}