@misc{ladwig_has_the_2003, 
author={Ladwig, N.,Hesse, K.-J.,Colijn, F.,Tillmann, U.},
title={Has the eutrophic state of German Wadden Sea waters changed over the past 10 years due to nutrient reduction?},
year={2003},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Ladwig, N.; Hesse, K.; Colijn, F.; Tillmann, U.: Has the eutrophic state of German Wadden Sea waters changed over the past 10 years due to nutrient reduction?. ICES Marine Science Symposia. 2003. vol. 219, 199-207.}}