List of Articles Mathematical programming model Open Access Article Abstract Page Full-Text 1 - Green Reverse Supply Chain on the Way of Optimization: A Case of Dairy Sector zeinab zarrat dakheli parast hassan haleh soroush avakh darestani hamzeh amin tahmasbi 10.22094/jcr.2022.1971275.1283 Open Access Article Abstract Page Full-Text 2 - Nurse Scheduling Problem by Considering Fuzzy Modeling Approach to Treat Uncertainty on Nurses’ Preferences for Working Shifts and Weekends off Hamed Jafari Hassan Haleh 10.22094/joie.2019.576759.1595 Open Access Article Abstract Page Full-Text 3 - A bi-objective mathematical model for the patient appointment scheduling problem in outpatient chemotherapy clinics using Fuzzy C-means clustering: A case study Masoud Rabbani Alireza Khani amirreza Zare niloofar Akbarian-Saravi 10.22094/joie.2022.1928133.1849 Open Access Article Abstract Page Full-Text 4 - A mathematical programming model for single round-robin tournament problem: A case study of Volleyball Nations League Hamed Jafari Morteza Rajabzadeh 10.22094/joie.2022.1891205.1721 Open Access Article Abstract Page Full-Text 5 - A stochastic model for operating room planning under uncertainty and equipment capacity constraints J. Razmi M. Barati M. S. Yousefi J. Heydari Open Access Article Abstract Page Full-Text 6 - Change from the purchasing price policy to the guaranteed price policy and its effects on cropping pattern in Qazvin plain mehdi shabanzadeh Gholamreza peykanei seyed safdar hoseini saeid yazdanei