“The Effect of Unreliable Machine for Two Echelons Deteriorating Inventory Model”. Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri 16, no. 2 (December 31, 2014): 107–112. Accessed July 20, 2026. https://jurnalindustri.petra.ac.id/index.php/ind/article/view/19102.