Walko, J.: 'Down the line [Powerline communications]', Communications Engineer, 2005, 3, (2), p. 12-15, DOI: 10.1049/ce:20050201 IET Digital Library, https://digital-library.theiet.org/;jsessionid=g7r3qn117s6p8.x-iet-live-01content/journals/10.1049/ce_20050201