Anifowose, Maroof Opeyemi, et al. “Assessment of Cost Management Functions of Quantity Surveyors With Lean Methodology”. International Journal of Sustainable Construction Engineering and Technology, vol. 4, no. 2, Nov. 2013, pp. 67-81, https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/561.