@misc{roenicke_control_of_1993, 
author={Roenicke, H.,Klapper, H.,Beyer, M.},
title={Control of phosphorus and blue greens by nutrient precipitations; long-term study},
year={1993},
howpublished = {conference paper,conference lecture: Stresa (I); 1993},
note = {Online available at: \url{} (DOI). Roenicke, H.; Klapper, H.; Beyer, M.: Control of phosphorus and blue greens by nutrient precipitations; long-term study. In: 5th International Conference on the Conservation and Management of Lakes. Stresa (I). 1993. 177.}}