Abd, Haitham Jameel. “Numerical Investigation of Reinforced Concrete Beams With Single and Multi-Longitudinal Hollow Openings”. Diyala Journal of Engineering Sciences 17, no. 1 (March 7, 2024): 63–74. Accessed November 23, 2024. https://mail.djes.info/index.php/djes/article/view/1231.