@article{Drenckhahn2017,
  author    = {Detlev Drenckhahn},
  title     = {Vorkommen des Atlantischen Wildkohls (Brassica oleracea L. subsp. oleracea) an den Kreidefelsen der Ostseeinsel R{\"u}gen, Deutschland},
  journal   = {Forum Geobotanicum},
  volume    = {7},
  doi       = {10.3264/FG.2017.0116},
  url       = {http://www.forum-geobotanicum.net/articles/vol_7-2016/drenckhahn_brassica/drenckhahn_brassica_oleracea.pdf},
  year      = {2017},
}