1. (1) S. Yokoyama and N. Vasa: “Study on Lightning Damage of Wind Turbine Blades and Protection Method of them”, The Paper of Joint Technical Meeting on Electrical Discharge and High Voltage and Switching, IEE Japan, ED-02-56, HV-02-40, pp. 31-36 (2002) (in Japanese)
2. 横山 茂.Nilesh Vasa: 「風車ブレード雷害の問題点と対策の方向性」, 電気学会放電.高電圧合同研資, ED-02-56, HV-02-40, pp. 31-36 (2002)
3. Lightning Damages of Wind Turbine Blades and Protection Methods of them
4. 横山 茂: 「風車ブレードの雷害問題」, 電学論B, 124, 2, pp. 177-180 (2004-2)
5. (3) “Characteristics of upward lightning current at the Coast of the Sea of Japan in Winter 1989-2002”, Komae Research Laboratory, Rep. No. T03024 (2004) (in Japanese)