O. Drogehorn, S. Haseloff, T. Loeffler, W. Dargie, S. Lau, and K. David. Intelligent Sensors, Sensor Networks and Information Processing Conference, 2005. Proceedings of the 2005 International Conference on, page 211 - 216. (2005)
O. Drogehorn, and K. David. SAINT-W '05: Proceedings of the 2005 Symposium on Applications and the Internet Workshops, page 132--135. Washington, DC, USA, IEEE Computer Society, (2005)