@book{4473,
	author = {Girod, Bernd. and Rabenstein, Rudolf.},
	title = {Signals and systems /},
	publisher = {Wiley,},
	year = {c2001.},
	address = {Chichester ;},
	url = {http://www.loc.gov/catdir/bios/wiley043/2001024349.html}
}