Formation of a negative streamer in nitrogen and air in a non-uniform electric field at submicrosecond front of voltage pulse / M. I. Lomaev, D. V. Beloplotov, V. F. Tarasenko, D. A. Sorokin // 6th International congress on energy fluxes and radiation effects (EFRE 2018), September 16-22, 2018, Tomsk, Russia : abstracts. Tomsk, 2018. P. 223. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000648582