Fehan, Hassan, and Osaro Aigbogun. “Impact of External Environmental Factors on Construction Firms’ Performance, Mediated By Institutional Pressures”. Civil Engineering Journal 8, no. 5 (May 1, 2022): 967–984. Accessed September 12, 2025. https://www.civilejournal.org/index.php/cej/article/view/3413.