@conference {giemza_challenges_2012, title = {Challenges in scaling mobile learning applications: the example of quizzer}, booktitle = {Wireless, Mobile and Ubiquitous Technology in Education (WMUTE 2012) IEEE Seventh International Conference on}, year = {2012}, note = {00002}, pages = {287{\textendash}291}, author = {Adam Giemza and Verheyen, Per and H. Ulrich Hoppe} }