@misc{callies_experiments_on_1996, 
author={Callies, U., Rhodin, A., Eppel, D. P.},
title={Experiments on variational soil humidity analysis by assimilation of near-surface atmospheric observations},
year={1996},
howpublished = {report part},
note = {Callies, U.; Rhodin, A.; Eppel, D.: Experiments on variational soil humidity analysis by assimilation of near-surface atmospheric observations. In: Staniforth, A. (Ed.): Research activities in atmospheric and oceanic modeling: CAS/JSC Working Group on Numerical Experimentation.. 1996.}}