@book{51173,
	author = {Phillips, Charles L. and Parr, John M.},
	title = {Signals, systems, and transforms /},
	publisher = {Pearson/Prentice Hall,},
	year = {c2008},
	address = {Upper Saddle River, NJ :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0718/2007021144.html}
}