@incollection{Sommermann2018,
  author    = {Karl-Peter Sommermann},
  title     = {Prinzipien des Verwaltungsrechts},
  series = {Handbuch Ius Publicim Europaeum, Band 5},
  editor    = {Armin von Bogdandy and Sabino Cassese and Peter M. Huber},
  publisher = {M{\"u}ller},
  address   = {Heidelberg},
  isbn      = {978-3-8114-5506-1},
  pages     = {863 -- 892},
  year      = {2018},
  abstract  = {.},
  language  = {de}
}