@book{16134,
	author = {Hoffmann, Randall A. and Villa Issa, Manuel.},
	title = {Programación de modelos lineales de optimización; programa P3699.},
	publisher = {E.N.A. Colegio de Postgraduados,},
	year = {1970.},
	address = {Chapingo, Méx. :}
}