@misc{schiller_derivation_of_2001, 
author={Schiller, K.},
title={Derivation of the Photosynthetically Available Radiation from METEOSAT Data},
year={2001},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Schiller, K.: Derivation of the Photosynthetically Available Radiation from METEOSAT Data. GKSS 2001-23. 2001.}}