@book{KuehlingKummer1999,
  author    = {K{\"u}hling, Matthias and Kummer, Volker},
  title     = {Bemerkenswerte Flechtenfunde aus Brandenburg IV},
  year      = {1999},
  language  = {de}
}
@article{KuehlingKummer1999,
  author    = {K{\"u}hling, Matthias and Kummer, Volker},
  title     = {Im Land der Araukarier},
  year      = {1999},
  language  = {de}
}