@article{Hebel2008,
  author    = {Hebel, Christoph},
  title     = {Taxiverkehr in Deutschland},
  series = {Stadt Region Land (2008)},
  journal   = {Stadt Region Land (2008)},
  isbn      = {0344-9645},
  pages     = {21 -- ff},
  year      = {2008},
  language  = {de}
}