“Fifty Years of Eutrophication and Lake Restoration Reflected in Sedimentary Carbon and Nitrogen Isotopes of a Small, Hardwater Lake (south Germany)”. Journal of Limnology 72, no. 2 (April 23, 2013): e21. Accessed July 3, 2025. https://www.jlimnol.it/jlimnol/article/view/jlimnol.2013.e21.