“The Development of Order Quantity Optimization Model for Growing Item Considering the Imperfect Quality and Incremental Discount in Three Echelon Supply Chain”. 2021. Jurnal Teknik Industri: Jurnal Keilmuan Dan Aplikasi Teknik Industri 23 (2): 101-10. https://doi.org/10.9744/jti.23.2.101-110.