@misc{floeser_a_simple_1999, 
author={Floeser, G.M.},
title={A simple nitrate box model for an East Friesian Wadden Sea bight},
year={1999},
howpublished = {GKSS report},
note = {Floeser, G.: A simple nitrate box model for an East Friesian Wadden Sea bight. GKSS 99-E-64. 1999.}}