@inproceedings{PucherSchmoellebeckHofmann2007,
  author    = {Robert Pucher and Fritz Schm{\"o}llebeck and Alexander Hofmann},
  title     = {Teaching in Project Based Learning Environments and the Role of Intrinsic vs. Extrinsic Motivation},
  booktitle = {Proceedings of the International conference ICBL 2007},
  year      = {2007},
}