@article{BernhardSchmidtWellenburg2012,
  author    = {Bernhard, Stefan and Schmidt-Wellenburg, Christian},
  title     = {Einleitung},
  isbn      = {978-3-531-18018-2},
  year      = {2012},
  language  = {de}
}
@article{BernhardSchmidtWellenburg2012,
  author    = {Bernhard, Stefan and Schmidt-Wellenburg, Christian},
  title     = {Feldanalyse als Forschungsprogramm},
  editor    = {Schmidt-Wellenburg, Christian},
  isbn      = {978-3-531-17871-4},
  year      = {2012},
  language  = {de}
}
@article{BernhardSchmidtWellenburg2012,
  author    = {Bernhard, Stefan and Schmidt-Wellenburg, Christian},
  title     = {Einleitung},
  isbn      = {978-3-531-17871-4},
  year      = {2012},
  language  = {de}
}