Asad A Khalid, and Murhamdilah Murni. “Energy Absorption and Failure Mechanism of Aluminium Bi-Tubular Cones under Axial Compression”. International Journal of Integrated Engineering, vol. 17, no. 8, Dec. 2025, pp. 139-47, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/24094.