Jahangirfard, Majid, Hajalian, Farshad, Zamanian, Ali reza. “Clustering Iranian Gas Industry Managers and Ranking Their Competencies via the EFQM Excellence Model-based Evaluation with an Artificial Intelligence Approach.” Quarterly Journal of Training and Development of Human Resources, vol. 8, no. 31, 2022, pp. 51-80. 10.52547/istd.31542.8.31.51