Sutapa, I Nyoman, and I Gede Agus Widyadana. 2014. “The Effect of Unreliable Machine for Two Echelons Deteriorating Inventory Model”. Jurnal Teknik Industri: Jurnal Keilmuan Dan Aplikasi Teknik Industri 16 (2):107-12. https://doi.org/10.9744/jti.16.2.107-112.