L. Lee, Y. Juan, K. Lee, W. Tseng, H. Chen, and Y. Tseng. Proceedings of the 2012 ACM conference on Computer and communications security, page 992--994. New York, NY, USA, ACM, (2012)
Y. Ding, H. Schmidtke, and M. Beigl. Proceedings of the 12th ACM international conference adjunct papers on Ubiquitous computing - Adjunct, page 401--402. New York, NY, USA, ACM, (2010)
C. Ratto, P. Torrione, K. Morton, and L. Collins. Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International, page 4192 -4195. (July 2010)