@book{34627,
	author = {Soifer, Alexander. and SpringerLink (Online service)},
	title = {The Colorado Mathematical Olympiad and Further Explorations},
	publisher = {Springer US,},
	year = {2011.},
	address = {Boston, MA :},
	url = {http://dx.doi.org/10.1007/978-0-387-75472-7}
}