Alireza Jahandideh, and Amirhossian Chambaria. “Estimation of Production Function and Labor Productivity Rate in Aghajari Oil and Gas Production Company”. Singaporean Journal of Business Economics and Management 5, no. (12) (December 31, 2017): 8–21. Accessed April 28, 2026. https://singaporeanjbem.com/index.php/SJBEM/article/view/383.