@article{Martens2009,
  author    = {Alke Martens},
  title     = {Game-based Learning},
  journal   = {Commentarii informaticae didacticae : (CID)},
  series    = {der Prof. mit der Pappnase?},
  number    = {1},
  pages     = {39 -- 46},
  year      = {2009},
}