@article{GzikHahnKuehlingetal.1997,
  author    = {Gzik, Axel and Hahn, Robert and K{\"u}hling, Matthias and Zehle, S.},
  title     = {Bl{\"u}ten{\"o}kologisches Monitoring von Konversationsfl{\"a}chen in Brandenburg},
  year      = {1997},
  language  = {de}
}
@article{ZehleGzikHahnetal.1997,
  author    = {Zehle, S. and Gzik, Axel and Hahn, Robert and K{\"u}hling, Matthias},
  title     = {Erste Ergebnisse eines bl{\"u}ten{\"o}kologischen Monitoring von Sukzessionsfl{\"a}chen},
  year      = {1997},
  language  = {de}
}