@book{KuepperGrabow2011,
  author    = {K{\"u}pper, Georg and Grabow, Stefan},
  title     = {Die sukzessive Qualifikation von Raub und r{\"a}uberischer Erpressung},
  isbn      = {3-8114-5428-5},
  year      = {2011},
  language  = {de}
}