Al-Ansari, L.S., Al-Waily, M. and Al-Hajjar, A.M.H. (2012) “Experimental and Numerical Study of Crack Effect on Frequency of Simple Supported Beam”, Al-Khwarizmi Engineering Journal, 8(2), pp. 30–41. Available at: https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/127 (Accessed: 13 December 2025).