@book{HautzingerStockMayeretal.2011,
  author    = {Heinz Hautzinger and Wilfried Stock and Karin Mayer and Jochen Schmidt and Dirk Heidemann},
  title     = {Fahrleistungserhebung 2002 - Inl{\"a}nderfahrleistung},
  year      = {2011},
}