Kempe, Stephan, and Peter Krahe. “Water and Biogeochemical Fluxes in the River Rhine Catchment”. ERDKUNDE 59, no. 3/4 (December 31, 2005): 216–250. Accessed October 7, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/2549.