@misc{roeckner_the_impact_1989, 
author={Roeckner, E., Schlese, U., Rockel, B.},
title={The impact of cloud and radiation parameterization changes in January and July simulations with the ECMWF T21 model},
year={1989},
howpublished = {report part},
note = {Roeckner, E.; Schlese, U.; Rockel, B.: The impact of cloud and radiation parameterization changes in January and July simulations with the ECMWF T21 model. In: Climate simulations with the ECMWF T21 model in Hamburg; Part III: Diagnosis of response experiments. 1989. 139-186.}}