Talib, Mustafa Hassan, and Afrah Mohammed Hassan Kashkol. “Theory of Constraints in Construction Projects”. Journal of University of Babylon for Engineering Sciences 27, no. 2 (May 26, 2019): 109 - 124. Accessed August 15, 2020. https://www.journalofbabylon.com/index.php/JUBES/article/view/2302.