@book{Ebner2012, author = {Ebner, Martin and Schön, Sandra}, year = {2012}, isbn = {978-3-8423-8245-9}, language = {ger}, copyright = {http://creativecommons.org/licenses/by-nc-nd/3.0/de/}, title = {Die Zukunft von Lern- und Lehrmaterialien: Entwicklungen, Initiativen, Vorhersagen.}, url = "http://dx.doi.org/10.17169/refubium-22952", }