@inproceedings{kae12,
 author = {T. K{\"a}ser and A. G. Busetto and G.-M. Baschera and J. Kohn and K. Kucian and M. von Aster and M. Gross},
 title = {Modelling and Optimizing the Process of Learning Mathematics},
 booktitle = {Proceedings of ITS},
 publisher = {Springer Berlin Heidelberg},
 year = {2012},
 }