1. (1) Global Wind Energy Council: Publications “Global Wind 2008 report—Second Edition”, http://www.gwec.net/fileadmin/documents/Global%20Wind%202008%20Report.pdf (2009-3)
2. (2) (独)新エネルギー.産業技術総合開発機構(NEDO)HP: http://www.nedo.go.jp/ (2008)
3. (5) T. Nanahara: “Lightning Surge Analysis Including Diagonal Wires Based on the FDTD Method”, T. IEE Japan, Vol. 120-B, No. 3, pp. 321-324 (2000-3) (in Japanese)