Trung, T. N., I. O. Golosnoy, P. L. Lewin, and T. K. V. Dung. “A Two-Phase Model for the Development of Positive Surface Discharge in Air”. Petrovietnam Journal, Vol. 6, June 2012, pp. 58-69, https://tapchidaukhi.com/index.php/TCDK/article/view/972.