@book{69591,
	author = {Oppenheim, Alan V., and Willsky, Alan S.},
	title = {Signals and systems /},
	publisher = {Prentice-Hall,},
	year = {c1983 [reprint1992]},
	series = {Prentice-Hall signal processing series},
	address = {Englewood Cliffs, N.J. :},
	note = {Includes index.}
}