@article{Sumser2015,
  author    = {Hubert Sumser},
  title     = {Exkursion: K{\"o}ln-Lindenthal, Stadtbotanik},
  journal   = {Jahrbuch des Bochumer Botanischen Vereins},
  volume    = {6},
  pages     = {83 -- 86},
  year      = {2015},
}