@misc{claussen_estimation_of_1991, 
author={Claussen, M.},
title={Estimation of areally-averaged surface fluxes},
year={1991},
howpublished = {conference lecture: Wiesbaden (D);},
note = {Claussen, M.: Estimation of areally-averaged surface fluxes. XVI General Assembly of the European Geophysical Society. Wiesbaden (D), 1991.}}