Amer M. Ibrahim, and Manahel Sh. Khalaf. “The Ovalisation of Steel Circular Hollow Sections under Bending”. Diyala Journal of Engineering Sciences 11, no. 1 (March 1, 2018): 12 –. Accessed November 21, 2024. https://mail.djes.info/index.php/djes/article/view/163.