@misc{callies_combining_model_2011, 
author={Callies, U.},
title={Combining model simulations and observations: Benefits and observations},
year={2011},
howpublished = {conference lecture (invited): Helgoland (D);},
note = {Callies, U.: Combining model simulations and observations: Benefits and observations. BAH-Kolloquium. Helgoland (D), 2011.}}