Amro, Belal; Saygin, Yucel; Levi, Albert(SPRINGL '11 Proceedings of the 4th ACM SIGSPATIAL International Workshop on Security and Privacy in GIS and LBS Pages 1-8, 2011-11)
Amro, Belal; Saygin, Yucel; Levi, Albert(SPRINGL '10 Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Security and Privacy in GIS and LBS Pages 55-59, 2010-11)