Liu, Dian, Hong-wei Wang, Heng Li, Johnny Wang, and Mohamed Khallaf. “Hierarchical Task Network Approach for Time and Budget Constrained Construction Project Planning”. Technological and Economic Development of Economy 25, no. 3 (April 8, 2019): 472-495. Accessed November 26, 2024. https://tede.vgtu.lt/index.php/TEDE/article/view/9384.