@inbook{13266, author = {{Müller, Claudia and Trier, Matthias and Herzog, Michael A.}}, booktitle = {{E-Learning}}, isbn = {{3790815888}}, title = {{{Process-Oriented Production of Learning Units for Sustainable E-Learning Offerings}}}, doi = {{10.1007/3-7908-1655-8_27}}, year = {{2005}}, }