Goolak, Sergey, Viktor Tkachenko, Gintautas Bureika, and Gediminas Vaičiūnas. “Method of Spectral Analysis of Traction Current of AC Electric Locomotives”. Transport 35, no. 6 (December 31, 2020): 658-668. Accessed November 4, 2024. https://bme.vgtu.lt/index.php/Transport/article/view/14242.