LEE, In-Won; JUNG, Hyung-Jo; KIM, Man-Cheol. Efficient free vibration analysis of large structures with close or multiple natural frequencies. Part I: Undamped structures. Computer Assisted Methods in Engineering and Science, [S. l.], v. 6, n. 3-4, p. 403–414, 2023. Disponível em: https://cames3.ippt.pan.pl/index.php/cames/article/view/1299. Acesso em: 19 apr. 2025.