@article{Doerken2010,
  author    = {Veit Martin D{\"o}rken},
  title     = {Pflanzenportr{\"a}t: Cornus mas - Kornelkirsche (Cornaceae)},
  volume    = {1},
  pages     = {213 -- 215},
  url       = {http://www.botanik-bochum.de/},
  year      = {2010},
}