@book{1421,
	author = {Oppenheim, Alan V. and Willsky, Alan S.-  Nawab, Syed Hamid},
	title = {Signals and Systems /},
	publisher = {Prentice Hall,},
	year = {2008.},
	series = {2nd edition.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://10.10.170.122:8080/browse/book/22877}
}