@book{77152,
	author = {Brousseau, Guy. and Balacheff, Nicolas. and ebrary, Inc.},
	title = {Theory of didactical situations in mathematics},
	publisher = {Kluwer Academic Publishers,},
	year = {c1997.},
	series = {Mathematics education library ;},
	address = {Dordrecht ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10048345}
}