Khan, M. I. . (2021) “Critical Barriers in Project Management Faced by Offshore Software Multi-Sourcing Vendors: A Detailed Study: Multi-sourcing risks ”, Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, 53(3), pp. 267–280 . Available at: http://ppaspk.org/index.php/PPAS-A/article/view/285 (Accessed: 4 December 2025).