LUINTEL, M. C. Direct Method for the Determination of Coefficients of Characteristic Equation of a MDOF System. Journal of the Institute of Engineering, [S. l.], v. 15, n. 2, p. 26–31, 2019. DOI: 10.3126/jie.v15i2.27638. Disponível em: https://www.nepjol.info/index.php/JIE/article/view/27638. Acesso em: 29 apr. 2024.