@book{592701,
	author = {Chen, Chi-Tsong. and Chen, Chi-Tsong.},
	title = {Signals and systems /},
	publisher = {Oxford University Press,},
	year = {2004.},
	address = {Oxford ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0615/2003064970-d.html}
}