@article{MuehleBurkartPoetsch1998,
  author    = {M{\"u}hle, Ralf-Udo and Burkart, Michael and P{\"o}tsch, Joachim},
  title     = {On the importance of flooded grassland at the Ramsar site of the lower Havel river valley for waterfowl},
  issn      = {0761-9243},
  year      = {1998},
  language  = {en}
}
@article{MuehleBurkartPoetsch1997,
  author    = {M{\"u}hle, Ralf-Udo and Burkart, Michael and P{\"o}tsch, Joachim},
  title     = {Die Niederung der unteren Havel : ein Feuchtgebiet von internationaler Bedeutung},
  year      = {1997},
  language  = {de}
}
@article{BurkartPoetsch1996,
  author    = {Burkart, Michael and P{\"o}tsch, Joachim},
  title     = {Zur floristischen Gliederung und Syntaxonomie der Brenndoldenwiesen in der Unteren Havelaue},
  year      = {1996},
  language  = {de}
}