Géolocalisation Wifi : principles et services de géolocalisation Wifi et céllulaire


 * https://en.m.wikipedia.org/wiki/Wi-Fi_positioning_system#Public_Wi-Fi_location_databases
 * https://en.m.wikipedia.org/wiki/Mozilla_Location_Service
 * https://wiki.mozilla.org/CloudServices/Location/Software
 * https://developer.android.com/guide/topics/connectivity/wifi-rtt