Hendri, Z. and Hazmi, A. 2014. Karakteristik Preliminary Breakdown Petir Downward Leader Sebelum Sambaran Negatif Pertama. Jurnal Nasional Teknik Elektro. 3, 1 (Mar. 2014), 25–31. DOI:https://doi.org/10.25077/jnte.v3n1.52.2014.