1. P. Bahl and V.N. Padmanabhan, “RADAR: An In-Building RF-Based User Location and Tracking System”, Proceeedings IEEE Infocom, Tel Aviv, Israel, pp. 775–784, 2000.
2. Roos T., Myllymaki P., Tirri H., Misikangas P., Sievanen J. (2002) “A Probabilistic Approach to WLAN User Location Estimation”. International Journal Wireless Information Networks. 9, 155–164
3. G.V. Zaruba, M. Huber, and F.A. Kamanger, “Monte Carlo Sampling Based In-Home Location Tracking With Minimal RF Infrastructure Requirements”, Texas, Technical Report CSE-2002-6, Department of Computer Science, University of Texas, 2002.
4. A. Harter, A. Hopper, P. Steggles, A. Ward, and P. Webster, “The Anatomy of a Context-Aware Application”, Proceedings 5th Annual ACM/IEEE International Conference on Mobile Computing and Networking, Seattle, WA, pp. 59–68, 1999.
5. Want R., Hopper A., Falcao V., Gibbons J. (1992) “The Active Badge Location System”. ACM Transactions on Information Systems. 10, 91–102