Não informado. (2008). IET Generation, Transmission & Distribution. Institution of Engineering and Technology.
Lua i Stíl Chicago (17ú heag.)Não informado. IET Generation, Transmission & Distribution. Stevenage, Inglaterra: Institution of Engineering and Technology, 2008.
Lua MLA (8ú heag.)Não informado. IET Generation, Transmission & Distribution. Institution of Engineering and Technology, 2008.
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