Elena, A., Tsvetsinskaya, E. A., Schaaf, C. B., Gao, F., Strahler, A. H., Dickinson, R. E., Zeng, X., Lucht, W. (2002): Relating MODIS derived surface albedo to soils and landforms over Northern Africa and the Arabian peninsula. - Geophysical Research Letters, 29, 9, 67-1-67-4.