@book{63409,
	author = {Lemus, Víctor Leonel  and Víctor Leonel  Lemus, },
	title = {Software educativo para la asignatura de cálculo},
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {1999},
	address = {Neiva (Colombia) :},
	edition = {                   }
}