@book{7580,
	author = {Tocci, Ronald J. and Widmer, Neal S.},
	title = {Digital Systems : principles and applications },
	publisher = {Prentice Hall,},
	year = {2003.},
	address = {[S.l.] :},
	edition = {9th ed.},
	url = {http://10.10.170.122:8080/browse/book/2558}
}