@inbook {930, title = {Augmented Reality und r{\"a}umliche Entscheidungsunters{\"u}tzung mit dem Smartphone}, booktitle = {Beitr{\"a}ge zum Mathematikunterricht 2013}, year = {2013}, publisher = {WTM-Verlag}, organization = {WTM-Verlag}, address = {M{\"u}nster}, author = {Platz, Melanie and Niehaus, Engelbert} }