@book{45142,
	author = {Sundararajan, D.},
	title = {A practical approach to signals and systems /},
	publisher = {John Wiley & Sons (Asia),},
	year = {c2008},
	address = {Singapore :},
	url = {http://www.loc.gov/catdir/enhancements/fy0827/2008012023-t.html}
}