@article{RaetzelKummer2010,
  author    = {Raetzel, Stefan and Kummer, Volker},
  title     = {Die Erforschung der in Brandenburg vorkommenden Kryptogamen nach 1945 (Moose, Pilze)},
  year      = {2010},
  language  = {de}
}
@article{RistowHerrmannIlligetal.2006,
  author    = {Ristow, Michael and Herrmann, Andreas and Illig, Hubert and Klemm, Gunther and Kummer, Volker and Kl{\"a}ge, Hans-Christian and Machatzi, Bernd and Raetzel, Stefan and Schwarz, R. and Zimmermann, Friedrich},
  title     = {Liste und Rote Liste der etablierten Gef{\"a}ßpflanzen Brandenburgs},
  year      = {2006},
  language  = {de}
}