L. Lee, Y. Juan, K. Lee, W. Tseng, H. Chen, und Y. Tseng. Proceedings of the 2012 ACM conference on Computer and communications security, Seite 992--994. New York, NY, USA, ACM, (2012)
C. Ratto, P. Torrione, K. Morton, und L. Collins. Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International, Seite 4192 -4195. (Juli 2010)