Mi’rajudin, M. Manaseh, and K. Arifin. “Helix Gear Wear Analysis On Line Boring Machine At PT. SSC WORKS Salok Api”. Jurnal Rekayasa Mesin Dan Inovasi Teknologi, vol. 2, no. 1, June 2021, pp. 100-5, http://jurnal.ftm.uniba-bpn.ac.id/index.php/REMIT/article/view/27.