@inproceedings{GroetschelLuegger2009, author = {Martin Gr{\"o}tschel and Joachim L{\"u}gger}, title = {E - Learning and the Working Mathematician}, booktitle = {Grundfragen Multimedialen Lehrens und Lernens - Tagungsband GML 2009}, pages = {8 -- 27}, year = {2009}, }