@book{20966,
	author = {Kolman, Bernard, and Busby, Robert C.},
	title = {Discrete mathematical structures /},
	publisher = {Prentice Hall,},
	year = { 1996},
	address = {Upper Saddle River, NJ.:},
	edition = {3rd. ed.},
	note = {Rev. ed. of: Discrete mathematical structures for computer science. 2nd. ed. c1987}
}