Bak, Claus Leth; Faria da Silva, Filipe: 'Deploying correct fault loop in distance protection of multiple-circuit shared tower transmission lines with different voltages', The Journal of Engineering, 2018, 2018, (15), p. 1087-1090, DOI: 10.1049/joe.2018.0158
IET Digital Library, https://digital-library.theiet.org/;jsessionid=36q2mdk547mr9.x-iet-live-01content/journals/10.1049/joe.2018.0158