MUTALA, Gideon Nzioki. Modeling Natural Frequencies of Vibration of Three Dimensional Frames under Two Dimensional Loading. Apex Journal of Advanced Sciences & Engineering, [S. l.], v. 5, n. 1, p. 71–92, 2016. DOI: 10.18034/ajase.v5i1.67. Disponível em: https://ajase.net/article/view/67. Acesso em: 15 mar. 2026.