Shahid, K. A., Sulaiman, M. A., Ghazali, N., Rahman, W. A., & Zukri, A. (2014). Palm Oil Clinker as Drainage Layer in Green Roof System Under Malaysia Climatic Conditions. Journal of Engineering and Technology (JET), 5(2), 27–38. Retrieved from https://jet.utem.edu.my/jet/article/view/158