ZHANG, Xiaochuan. A Modal Approximation Method of Frequency Modification. Technische Mechanik - European Journal of Engineering Mechanics, [S. l.], v. 14, n. 1, p. 43–50, 2019. Disponível em: https://journals.ub.ovgu.de/index.php/techmech/article/view/1282. Acesso em: 13 may. 2024.