Isa, Nur Asyiqin, et al. “Significant Lightning Stroke Count in Negative Ground Flashes Featuring the Relationship of Preliminary Breakdown and The First Return Stroke”. International Journal of Integrated Engineering, vol. 15, no. 1, Apr. 2023, pp. 248-5, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/12079.