Ig. Jaka, Ivan Gunawan, Yunia Vera Angelia, and Dian Trihastuti. 2020. “A Hybrid Simulation Study to Determine an Optimal Maintenance Strategy”. Jurnal Optimasi Sistem Industri 19 (2):91–100. http://josi.ft.unand.ac.id/index.php/josi/article/view/142.