1. Junhui, Z., Yongcai, W.: Autonomous Ultrasonic Indoor Tracking System. In: Proceedings of the 2008 International Conference on Intelligent Pervasive Computing (IPC 2008), Sydney, Australia (2008)
2. Mao, G., Fidan, B., Anderson, B.D.: Wireless sensor network localization techniques. Comput. Netw. 51(10), 2529–2553 (2007)
3. Pan, J.J., Pan, S.J., Zheng, V.W., Yang, Q.: Digital Wall: A Power-efficient Solution for Location-based Data Sharing. In: PERCOM 2008, pp. 645–650. IEEE Computer Society, Washington (2008)
4. Lecture Notes in Computer Science;A. Kapadia,2007
5. Capkun, Hubaux, J.P.: Secure positioning of wireless devices with application to sensor networks. In: Proceedings of the 24th Annual Joint Conference of the IEEE Computer and Communications Societies, vol. 3, pp. 1917–1928 (2005)