1. The History of Power Transmission by Radio Waves
2. Western Australian: Virtual Miners Memorial. Mining Accidents Databasehttp://www.wavmm.com/mining-accidents-database/
3. Wireless Communication in Underground Mines: RFID-Based Sensor Networking;Bandyopadhyay,2009
4. Characteristics of Coal Mine Accidents and New Technologies of Coal Mine Communication, Personnel Positioning and Monitoring;Sun;Ind. Mine Autom.,2015