@article{DoerkenJagel2010,
  author    = {Veit D{\"o}rken and Armin Jagel},
  title     = {Pflanzenportr{\"a}t: Magnolia spp. - Magnolien (Magnoliacae)},
  volume    = {1},
  pages     = {244 -- 248},
  url       = {http://www.botanik-bochum.de/},
  year      = {2010},
}