@article{Doerken2012,
  author    = {Veit Martin D{\"o}rken},
  title     = {Passiflora spp. - Passionsblumen (Passifloraceae)},
  journal   = {Jahrbuch des Bochumer Botanischen Vereins},
  volume    = {3},
  pages     = {251 -- 262},
  year      = {2012},
}