@misc{bahr_limnologisches_gutachten_1990, 
author={Bahr, K.,Klapper, H.},
title={Limnologisches Gutachten Byhleguhrer See},
year={1990},
howpublished = {report},
note = {Online available at: \url{} (DOI). Bahr, K.; Klapper, H.: Limnologisches Gutachten Byhleguhrer See. 1990.}}