@article{BirnMueller2006,
  author    = {Birn, Lukas and M{\"u}ller, Claudia},
  title     = {Kollaboratives Dokumentieren mit Sozialer Software},
  year      = {2006},
  language  = {de}
}
@article{MuellerBirn2006,
  author    = {M{\"u}ller, C. and Birn, Lukas},
  title     = {Wikis for collaborative software documentation},
  year      = {2006},
  language  = {en}
}