@book{35866,
	author = {Gregor, Jiří. and Tišer, Jaroslav. and SpringerLink (Online service)},
	title = {Discovering Mathematics},
	publisher = {Springer London,},
	year = {2011.},
	address = {London :},
	url = {http://dx.doi.org/10.1007/978-0-85729-064-9}
}