Karmiathi, N. M., and P. M. . Puja Yoga. “The Grounding Resistance Improvement of Distribution Substation Using Multiple Rods and Wood Charcoal As Soil Treatment”. Matrix : Jurnal Manajemen Teknologi Dan Informatika, vol. 13, no. 1, Mar. 2023, pp. 33-41, doi:10.31940/matrix.v13i1.33-41.