Khiem, Nguyen Tien, Nguyen Minh Tuan, and Pham Thi Ba Lien. “Crack Identification in Beam by Antiresonant Frequencies”. <i>Vietnam Journal of Mechanics</i> 43, no. 4 (December 20, 2021): 389–405. Accessed December 5, 2025. https://vjs.ac.vn/vjmech/article/view/16710.