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
2008,
Kaloudova Y, Rihova H, Brychta P, Suchanek I, Kucera J, Mensik I, Krupicova H, Lipovy B