@inbook {935,
	title = {To {\textquotedblleft}E{\textquotedblright} or not to {\textquotedblleft}E{\textquotedblright}? That is the Question. Chancen \& Grenzen eines E-Proof-Systems zur F{\"o}rderung von Beweiskompetenzen},
	booktitle = {Beitr{\"a}ge zum Mathematikunterricht 2015},
	year = {2015},
	publisher = {WTM-Verlag},
	organization = {WTM-Verlag},
	address = {M{\"u}nster},
	author = {Platz, Melanie and Niehaus, Engelbert}
}
@inbook {931,
	title = {Test-Umgebung f{\"u}r r{\"a}umliche Entscheidungsunterst{\"u}tzung zur sp{\"a}teren Verwendung in Augmented Reality f{\"u}r mobile Endger{\"a}te},
	booktitle = {Beitr{\"a}ge zum Mathematikunterricht 2012},
	year = {2012},
	publisher = {M{\"u}nster},
	organization = {M{\"u}nster},
	address = {WTM-Verlag},
	author = {Platz, Melanie and Niehaus, Engelbert}
}
