@phdthesis{Wilczek2005,
  author    = {Wilczek, Sabine},
  title     = {Spatial and seasonal distribution of extracellular enzyme activities in the River Elbe and their regulation by envirommental variables},
  pages     = {114 S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {en}
}