List of Articles Two-stage model Open Access Article Abstract Page Full-Text 1 - Designing a Multi-Product Supply Chain Model Despite Disruption in the Supplier With A Stable Mathematical Optimization Approach in Refinery Maintenance Industries Amir Rahimimanesh Hamzeh Amin-Tahmasbi Kambiz Shahroudi https://doi.org/10.71710/imj.2024-923150 Open Access Article Abstract Page Full-Text 2 - Malmquist Productivity Index Using Two-stage DEA Model in Heart Hospitals Alireza Alinezhad Mirpoya Mirmozaffari Open Access Article Abstract Page Full-Text 3 - Designing a Multi-Product Supply Chain Model Despite Disruption in the Supplier With A Stable Mathematical Optimization Approach in Refinery Maintenance Industries Simin Orji Hojat Nabovati https://doi.org/10.71710/imj.2024-923128