1. IEEE Computer Society, "Station and Media Access Control Connectivity Discovery," IEEE Std 802.1AB, 2005.
2. Dana, P., "Global Positioning System Overview", <http://www.colorado.edu/geography/gcraft/notes/gps/gps.html>.
3. US Department of Defence, "Global Positioning System Standard Positioning Service Signal Specification," 2d ed., June 1995.
4. OMA, "Secure User Plane Location (SUPL) 1.0," SUPL Enabler 1.0, January 2006.