@misc{claussen_estimation_of_1990, author={Claussen, M.}, title={Estimation of areally-averaged surface fluxes}, year={1990}, howpublished = {conference lecture: Groningen (D); September 26, 1990}, note = {Online available at: \url{} (DOI). Claussen, M.: Estimation of areally-averaged surface fluxes. Colloquium of the Department of Physical Geography, University of Groningen. Groningen (D), 1990.}}