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2008,
Capstick M, McRobbie D, Hand J, Christ A, Kühn S, Hansson Mild K, Cabot E, Li Y, Melzer A, Papadaki A, Prüssmann K, Quest R, Rea M, Ryf S, Oberle M, Kuster N
International Telecommunication Union (ITU),
Directives concerning the protection of telecommunication lines against harmful effects from electric power and electrified railway lines: 1-74, ISBN 978-92-61-12501-1