@book{41836,
	author = {Gutiérrez, Ángel,},
	title = {Handbook of Research on the Psychology of Mathematics Education :},
	publisher = {Brill | Sense,},
	year = {2006.},
	series = {Educational Research E-Books Online, Collection 2005-2017, ISBN: 9789004394001},
	address = {Leiden; },
	url = {http://dx.doi.org/10.1163/9789087901127}
}