Sagban Saadoon , Ahmed, and Kadhim Zuboon Nasser. “A Review Paper on Concrete-Filled Aluminum Tubular Columns”. Journal of University of Babylon for Engineering Sciences 27, no. 2 (June 10, 2019): 265 - 274. Accessed January 23, 2020. https://www.journalofbabylon.com/index.php/JUBES/article/view/2347.