Ling, Jen Hua, Yong Tat Lim, Wen Kam Leong, and How Teck Sia. “CONCRETE-FILLED TUBULAR COLUMN MADE OF VARIOUS TYPES OF MATERIAL”. Journal of Civil Engineering 38, no. 1 (July 23, 2025): 3. Accessed February 6, 2026. https://journal.its.ac.id/index.php/jce/article/view/7514.