@book{9515,
	author = {Ziemer, Rodger E. and Tranter, William H.},
	title = {Signals and systems :},
	publisher = {Pearson/Prentice Hall,},
	year = {c1998.[impression 2006]},
	address = {Upper Saddle River, NJ ;},
	edition = {4th ed.},
	note = {Includes index.}
}