@article {KorWinZol-Z-2011,
	title = {Stein f{\"u}r Stein: Mauern bauen {\textendash} Strukturen erkennen},
	journal = {Grundschulunterricht},
	year = {2013},
	keywords = {lehrer},
	author = {Kortenkamp, Ulrich and Winter, Christiane and Z{\"o}llner, Johanna}
}
