@book{6422,
	author = {Tocci, Ronald J. and Widmer, Neal S.},
	title = {Digital systems : principles and applications },
	publisher = {Prentice Hall,},
	year = {cop. 2001},
	address = {Upper Saddle River, N.J. :},
	edition = {8. ed.},
	note = {Hä²´ill CD-ROM}
}