@book{1853,
	author = {Emanuel, Pericles. and Leff, Edward.},
	title = {Introduction to feedback control systems /},
	publisher = {McGraw-Hill Education,},
	year = {1980.},
	address = {[S.l.] :},
	edition = {International Ed.},
	note = {International Edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070662754/chopaconline-20}
}