@inbook {850,
	title = {Einsatz virtueller Materialien zum Thema {\quotedblbase}F{\"o}rderung des r{\"a}umlichen Vorstellungsverm{\"o}gens{\textquotedblleft} am Beispiel der App Kl{\"o}tzchen},
	booktitle = {Digitale Medien im Mathematikunterricht der Primarstufe. Ein Handbuch f{\"u}r die Lehrerausbildung. 3. Band der Reihe Lernen, Lehren und Forschen mit digitalen Medien in der Primarstufe},
	year = {2017},
	pages = {131-148},
	publisher = {WTM-Verlag},
	organization = {WTM-Verlag},
	address = {M{\"u}nchen},
	author = {Ladel, Silke and Kuzle, Ana},
	editor = {Ladel, Silke and Schreiber, Christof and Rink, Roland}
}
@inbook {843,
	title = {Delving into the nature of problem solving processes in a dynamic geometry environment: Different technological effects on cognitive processing},
	booktitle = {Technology, Knowledge and Learning},
	year = {2016},
	pages = {1-28},
	publisher = {Springer Verlag},
	organization = {Springer Verlag},
	address = {Berlin Heidelberg},
	author = {Kuzle, Ana}
}
