PETERMANN, R.; COPETTI, R. D. Vibratory behavior of Euler-Bernoulli beams on elastic foundation: non-classical boundary conditions, orthogonality and external force. Ciência e Natura, [S. l.], v. 47, n. esp. 1, p. e89806, 2024. DOI: 10.5902/2179460X89806. Disponível em: https://periodicos.ufsm.br/cienciaenatura/article/view/89806. Acesso em: 23 jan. 2025.