Liu, Bingsheng, Bin Xue, Tengfei Huo, Geoffrey Shen, and Meiqing Fu. “Project External Environmental Factors Affecting Project Delivery Systems Selection”. Journal of Civil Engineering and Management 25, no. 3 (March 27, 2019): 276-286. Accessed October 5, 2024. https://ijspm.vgtu.lt/index.php/JCEM/article/view/7460.