Sugiyanto, Sugiyanto, and Tri Haryatno. “DESIGN OF GRAVEYARD LIGHT POLES AND MATHEMATICAL MODELING OF ELECTRIC USE IN GRAVEYARD LIGHTS”. Sunan Kalijaga Journal of Applied Mathematics 1, no. 2 (October 1, 2023): 57–61. Accessed May 1, 2025. http://sunankalijaga.org/jurnal/index.php/skjam/article/view/58.