Kalai, Maha, and Kamel Helali. “Total Factor Productivity Growth, Technological Progress and Technical Efficiency Changes: Productivity Change Dimensions in Tunisia”. Journal of Quantitative Methods 4, no. 2 (August 31, 2020): 76-100. Accessed April 3, 2025. https://ojs.umt.edu.pk/index.php/jqm/article/view/75.