TRUNG, N. T. Application of Hilbert Huang transform to identify the natural frequencies of steel frame. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, [S. l.], v. 13, n. 2, p. 64–73, 2019. DOI: 10.31814/stce.nuce2019-13(2)-06. Disponível em: https://stce.vjst.net/index.php/en/article/view/1314. Acesso em: 18 sep. 2026.