@book{3964,
	author = {Oppenheim, Alan V. and Willsky, Alan S. and Young, Ian T.},
	title = {Signals and systems},
	publisher = {Prentice-Hall},
	year = {1983},
	series = {Prentice-Hall signal processing series},
	address = {Englewood Cliff, N. J.},
	note = {Includes index}
}