@book{34172,
	author = {Blum, Werner||Artigue, Michèle||Mariotti, Maria Alessandra||Sträßer, Rudolf||Van den Heuvel-Panhuizen, Marja},
	title = {European Traditions in Didactics of Mathematics},
	url = {https://library.oapen.org/bitstream/20.500.12657/23021/1/1007140.pdf}
}