ZEB, A., HUSSAIN, K., AHMAD, U. and AJMAIR, M. (2017) “Factors affecting the services sector growth in Pakistan: A time varying parametric approach”, Journal of Economics Library, 4(3), pp. 388–395. Available at: https://journals.econsciences.com/index.php/JEL/article/view/1416 (Accessed: 25 January 2026).