@misc{ruprecht_accuracy_of_1989, 
author={Ruprecht, E., Hargens, U., Nacke, G.},
title={Accuracy of anisotropic reflectance factors determined from METEOSAT observations},
year={1989},
howpublished = {journal article},
note = {Ruprecht, E.; Hargens, U.; Nacke, G.: Accuracy of anisotropic reflectance factors determined from METEOSAT observations. Advances in Space Research. 1989. vol. 9, no. 7, 123-128.}}