Wei, He, Li Mengying, and Shuyi Guo. “Damage Identification for Metal Beam Structure Based on Curvature Difference and Frequency Perturbation”. Journal of Mines, Metals and Fuels 65, no. 5 (May 1, 2017): 252–257. Accessed May 9, 2024. https://www.informaticsjournals.com/index.php/jmmf/article/view/27002.