'Part 1 - Technology overview' (Energy Engineering, 2018), 'High Voltage Power Network Construction', Chap. pt1, pp. 33-36, DOI: 10.1049/PBPO110E_pt1
IET Digital Library, https://digital-library.theiet.org/;jsessionid=541df9dghq5e0.x-iet-live-01content/books/10.1049/pbpo110e_pt1