R. Barciauskas, J. A. Virbalis, and S. Zebrauskas, “An Electrostatic Approach to the Numerical Simulation of Combined Corona and Electrostatic Field in Three-Electrode System”, ELEKTRON ELEKTROTECH, vol. 122, no. 6, pp. 105–108, Jun. 2012, doi: 10.5755/j01.eee.122.6.1832.