T.S, T. F., N. Z. Mahmood, and C. R. Che Hassan. “A Study on Identification of Significant Environmental Aspects and Impacts of Piling and Foundation Works”. Malaysian Journal of Science, vol. 27, no. 1, Apr. 2008, pp. 47-59, https://malindojournal.um.edu.my/index.php/MJS/article/view/7931.