@misc{LudingRebhanRiexingeretal.2003,
  author    = {Roland Luding and Herbert Rebhan and Wolf-Dieter Riexinger and Michael Theis},
  title     = {Unsere gesch{\"u}tzte Natur},
  volume    = {3. Auflage},
  url       = {http://www.lubw.baden-wuerttemberg.de},
  type      = {workingpaper},
  pages     = {4},
  year        = {2003},
}