@phdthesis{Herffs2002,
  author      = {Harro Herffs},
  title       = {Der Abrechnungsbetrug des Vertragsarztes},
  type        = {doctoralthesis},
  pages       = {247 S.},
  doi       = {10.1007/978-3-642-59401-4},
  year        = {2002},
}