KHIEM, N. T. Damage detection of beam by natural frequencies: General theory and procedure. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 28, n. 2, p. 120–132, 2006. DOI: 10.15625/0866-7136/28/2/5572. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/5572. Acesso em: 9 may. 2024.