Munir I, Mahmood K, Shafqat Z, Ghaffar M. Procurement 4.0 and Sustainable Supply Chain Performance: The Mediating Role of Procurement Process Optimization (PPO). Pak. J. Humanit. Soc. Sci [Internet]. 2023 Dec. 6 [cited 2024 May 19];11(4):4151–4169. Available from: https://journals.internationalrasd.org/index.php/pjhss/article/view/1818