@misc{stuhlmann_statistics_of_1990, 
author={Stuhlmann, R., Rieland, M., Raschke, E.},
title={Statistics of global radiation and its diffuse component over Europe and Africa},
year={1990},
howpublished = {conference lecture: Miami, FL (USA);},
note = {Stuhlmann, R.; Rieland, M.; Raschke, E.: Statistics of global radiation and its diffuse component over Europe and Africa. In: American Society of Mechanical Engineers (Ed.): International Solar Energy Conference; Session 7A: Design Tools for Passive Solar und Building Energy Conservation. Miami, FL (USA). 1990. 20904-20910.}}