M. Machwitz, T. Landmann, A. Cord, C. Conrad, and S. Dech. Proceedings of the 2008 IEEE International Geoscience and Remote Sensing Symposium, Boston, Massachusetts, USA, (July 2008)
S. Dech, M. Bittner, and T. Erbertseder. Proceedings of the 9th Australasian Remote Sensing and Photogrammetry Conference, No 30, page 1603--1616. (1998)LIDO-Berichtsjahr=1999,.