Khan, Muhammad Imran, Siffat Ullah Khan, Abdul Wahid Khan, and Iqbal Qasim. 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):267-. http://ppaspk.org/index.php/PPAS-A/article/view/285.