Risan, H.K., Farhan, O.S. and Abbas, H.I. (2017) “Numerical Modal Analysis of Reinforced Concrete Slab with Opening”, Al-Nahrain Journal for Engineering Sciences, 20(2), pp. 368–377. Available at: https://nahje.com/index.php/main/article/view/116 (Accessed: 23 November 2024).