@article{HaeseGaedkeBeeseetal.1998,
  author    = {C. H{\"a}se and Ursula Gaedke and B. Beese and A. Seifried and M. Tilzer},
  title     = {Phytoplankton response to reoligotrophication in large and deep Lake Constance : Photosynthetic activity and chlorophyll concentration},
  year      = {1998},
}