Loong Chin, Chee, Chau Khun Ma, Jia Yang Tan, Abdullah Zawawi Awang, and Wahid Omar. 2018. “Effect Of Pre-Tensioned Level on Axial Stress-Strain Behaviour of Confined Concrete: A Review”. International Journal of Engineering & Technology 7 (3.9): 18-22. https://doi.org/10.14419/ijet.v7i3.9.15265.