Simanjuntak, Hendra Feryanto, and Fergyanto Gunawan. “Forecasting Modelling For Oil Country Tubular Goods (OCTG)”. Jurnal Teknik Industri Terintegrasi (JUTIN) 6, no. 4 (October 15, 2023): 1065–1078. Accessed July 22, 2024. http://journal.universitaspahlawan.ac.id/index.php/jutin/article/view/19164.