A vendor-buyer inventory model for defective items with errors in inspection, stochastic lead time and freight cost. - Ivan Darma Wangsa; Hui-Ming Wee (INFOR Inf. Syst. Oper. Res., 2019)

A coordinated vendor-buyer system considering loss and damage claims, insurance cost and stochastic lead time. - Ivan Darma Wangsa; Hui-Ming Wee; Shih-Hsien Tseng (Int. J. Syst. Assur. Eng. Manag., 2019)

A Sustainable Supply Chain Inventory Model with All-units Quantity Discount and Shipping Weight. - Ivan Darma Wangsa; Iwan Vanany; Nurhadi Siswanto (IEEM, 2021)

Sustainable Electrical Energy Supply Chain System With Hybrid Power Generation: An Inventory Approach. - Wakhid Ahmad Jauhari; I Nyoman Pujawan; Mokh Suef; Ivan Darma Wangsa (IEEE Access, 2021)

Optimization Model for Halal Gelatin Supply Chain with Carbon Emissions. - Iwan Vanany; Ivan Darma Wangsa; Rizki Revianto Putera; Niken Anggraini Savitri; Berto Mulya Wibawa (IEEM, 2022)

A Joint Economic Lot Size Model for a Single-manufacturer, Multiple Retailers, and Multi-product with Electric Trucks and Drone. - Ivan Darma Wangsa; Iwan Vanany; Nurhadi Siswanto (IEEM, 2022)

A multi-echelon fish closed-loop supply chain network problem with carbon emission and traceability. - Muhammad Ridwan Andi Purnomo; Ivan Darma Wangsa; Novrianty Rizky; Wakhid Ahmad Jauhari; Ismi Zahria (Expert Syst. Appl., 2022)

Identifying an effective last-mile customer delivery option with an integrated eco-friendly inventory model. - Ivan Darma Wangsa; Hui-Ming Wee; Yu Lin Hsiao; Novrianty Rizky (INFOR Inf. Syst. Oper. Res., 2022)

The Vendor-Buyer Inventory Model in Two Echelon Supply Chain: A Systematic Literature Review and Bibliometric Analysis. - Dana Marsetiya Utama; Fakhrina Fahma Abdullah; Ivan Darma Wangsa; Wakhid Ahmad Jauhari (Oper. Res. Forum, 2025)