@article{KerstingKuhlmann2018,
  author    = {Norbert Kersting and Sabine Kuhlmann},
  title     = {Sub-municipal Units in Germany},
  journal   = {Sub-municipal Units in Germany: Municipal and Metropolitan Districts},
  series    = {Municipal and Metropolitan Districts},
  pages     = {93 -- 118},
  doi       = {10.1007/978-3-319-64725-8_5},
  year      = {2018},
}