G. Pillai and Prof. Madya Ts. Dr. Norashidah Binti Abd Rahman, “A Review on Foamed Concrete Filled Hollow Section”, rtcebe, vol. 4, no. 1, pp. 403–410, May 2023, Accessed: Jul. 23, 2026. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/rtcebe/article/view/5829