1. IEEE 802.11 WG, Part 11: Wireless LAN medium access control (MAC) and physical layer (PHY) specification. IEEE 802.11 Standard 1999.
2. NTT DOCOMO, Ntt docomo i-mode[
http://www.nttdocomo.com/services/imode/index.html
]
3. Sprint, Sprint navigation[
http://navigation.sprint.com/snweb
]
4. Verizon, Verizen chaperone and navigator[
http://products.vzw.com/index.aspx?id=fnd_toolsApps_childFinder
]
5. Federal Communications Commission (FCC), Fcc report to congress on the deployment of e-911 phase ii services by tier iii service providers 2005.