@book{30000,
	author = {Biernson, George.},
	title = {Principles of feedback control :},
	publisher = {Wiley,},
	year = {c1988.},
	address = {New York :},
	note = {"A Wiley-Interscience publication."},
	url = {http://www.loc.gov/catdir/toc/onix05/87030539.html}
}