1. Tropos Networks http://www.tropos.com
2. BelAir Networks http://www.belairnetworks.com
3. Technology for All http://tfa.rice.edu
4. MIT Roofnet http://pdos.csail.mit.edu/roofnet/doku.php
5. O'Hara B. Petrick, A. (2005).The IEEE 802.11 Handbook: A Designer's Companion. IEEE Press, New York, NY,