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2. (4) IEC TR 61400-24, “Wind Turbine Generator Systems—Part24: Lightning protection” (2002)
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5. (8) O. Ukar, I. Zamora, R. Idiondo, and A. Mugica: “Analysis for High Frequencies of Grounding Systems, for Wind Turbines”, Proc. 27th ICLP (International Conference on Lightning Protection), Vol. II, pp. 1053-1057, Avignon, France (2004-9)