List of Articles Mathematical programming model Open Access Article Abstract Page Full-Text 1 - 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 20.1001.1.22519904.2021.14.1.6.7 Open Access Article Abstract Page Full-Text 2 - 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 3 - 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