1. Institute of Electrical Installation Engineers of Japan. Lightning Protection for Highly-Networked Information Society, 1999; (in Japanese).
2. Yokoyama S. Lightning Protection Design for Distribution Lines, ohm-sya 2005; (in Japanese).
3. Asakawa A, Ikuta M, Chiba R, Kato J, Kuramoto S. Experimental Study of Lightning Protection Coordination for Customer Equipment. CRIEPI report No. T01049, CRIEPI: 2002; (in Japanese).
4. Ikuta M, Asakawa A. Experimental Study of Customer Invasion Serge as Wiring both Distribution and Communication Line. CRIEPI report No. H06005, 2007; (in Japanese).