@book{5555,
	author = {Bollobás, Béla.},
	title = {Combinatorics :},
	publisher = {Cambridge University Press,},
	year = {c1986.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/cam023/86009602.html}
}