KIRILOVA, E., O. HEIRI, D. ENTERS, H. CREMER, A. F. LOTTER, B. ZOLITSCHKA, and T. HÜBENER. “Climate-Induced Changes in the Trophic Status of a Central European Lake”. Journal of Limnology, vol. 68, no. 1, Feb. 2009, pp. 71-82, doi:10.4081/jlimnol.2009.71.