@misc{stuhlmann_statistics_of_1988, 
author={Stuhlmann, R.,Raschke, E.},
title={Statistics of global radiation over Europe and Africa},
year={1988},
howpublished = {conference paper,conference lecture: Madrid (E); September 27-30, 1988},
note = {Online available at: \url{} (DOI). Stuhlmann, R.; Raschke, E.: Statistics of global radiation over Europe and Africa. In: Proceedings of the 7th METEOSAT User Meeting. Madrid (E). 1988. 119-127.}}