Lin, Chien-Liang, and Yu-Che Lai. “An Improved Time-Cost Trade-off Model With Optimal Labor Productivity”. Journal of Civil Engineering and Management 26, no. 2 (February 7, 2020): 113-130. Accessed April 20, 2024. https://journals.vilniustech.lt/index.php/JCEM/article/view/11663.