@book{30820,
	author = {Distefano, Joseph J. and Stubberud, Allen R.},
	title = {Retroalimentacion y sistemas de control /},
	publisher = {McGraw-Hill,},
	year = {1992.},
	series = {Serie de Compendios Schaum},
	address = {Mexico :},
	edition = {2a ed.}
}