@misc{johnsen_nwp_model_2002, 
author={Johnsen, K.-P.},
title={NWP model specific humidities compared with CHAMP / GPS and TERRA / MODIS data},
year={2002},
howpublished = {conference lecture: Potsdam (D); 22.-25.01.2002},
note = {Online available at: \url{} (DOI). Johnsen, K.: NWP model specific humidities compared with CHAMP / GPS and TERRA / MODIS data. 1st CHAMP Science Meeting. Potsdam (D), 2002.}}