Vukelja, Petar I., Radomir M. Naumov, Jovan D. Mrvić, and Dejan M. Hrvić. 2013. “Overvoltages During Switching Operations of Vacuum Switching Devices”. Proceedings, Electrical Engineering Institute "Nikola Tesla" 23 (23): 177-88. https://doi.org/10.5937/zeint23-4694.