@article{JentschKummer1994,
  author    = {Jentsch, Helmut and Kummer, Volker},
  title     = {Floristische Neufunde aus dem Spreewald},
  year      = {1994},
  language  = {de}
}
@article{KummerJentsch1997,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Elodea nuttallii (PLANCH.), St, Johan nun auch in Brandenburg},
  year      = {1997},
  language  = {de}
}
@article{KummerJentsch2001,
  author    = {Kummer, Volker and Jentsch, Helmut},
  title     = {Korrekturen und Nachtr{\"a}ge als Vorarbeit zu einer Flora des Spreewaldes},
  year      = {2001},
  language  = {de}
}
@article{KoernerSeitzJentschetal.2002,
  author    = {K{\"o}rner, Sabine and Seitz, Birgit and Jentsch, Helmut and Kummer, Volker},
  title     = {Der Spreewald : Lebensraum f{\"u}r gef{\"a}hrdete Pflanzenarten},
  year      = {2002},
  language  = {de}
}