Nikbakhsh, Mohammed Ali, and Mahdi Fatemikiya. “Developing a Human Resource Productivity Model in the Petrochemical Industry: Integrating Individual–Organizational Competencies and HR Innovation”. Journal of Personal Development and Organizational Transformation, vol. 4, no. 2, Apr. 1405, pp. 1-21, https://www.journalpdot.com/index.php/jpdot/article/view/274.