Very high frequency omnidirectional radio range – Wikipedia
What is the use of DME in aircraft? - Quora
What is the difference between VOR and DME? - Quora
vor' tag wiki - Aviation Stack Exchange
GYA Gaoyao VOR/DME Transmitter
Vor Radar, PDF, Aviation
VOR Chasing: My Unusual Hobby - World Airline Historical Society
Mafikeng VOR-DME (ID: MMV)
Distance Measuring Equipment - Features - Infinite Flight Community
Radio navigation - FlightGear wiki
File:Icons of VOR's.svg - Wikimedia Commons
AKB Aktyubinsk VOR/DME Transmitter - Aktobe