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)
T. Esch, C. Conrad, G. Schorcht, M. Thiel, T. Wehrmann, and S. Dech. Proceedings of the International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS), Part B8, Commission VIII, Beijing, China, (July 2008)