@book{35517,
	author = {Maher, Carolyn A. and Powell, Arthur B. and SpringerLink (Online service)},
	title = {Combinatorics and Reasoning},
	publisher = {Springer Netherlands,},
	year = {2010.},
	series = {Mathematics Education Library ;},
	address = {Dordrecht :},
	url = {http://dx.doi.org/10.1007/978-0-387-98132-1}
}