@book{32929,
	author = {Blum, Werner. and Galbraith, Peter L. and SpringerLink (Online service)},
	title = {Modelling and Applications in Mathematics Education},
	publisher = {Springer US,},
	year = {2007.},
	series = {New ICMI Study Series,},
	address = {Boston, MA :},
	url = {http://dx.doi.org/10.1007/978-0-387-29822-1}
}