M. VÖRÖS, Gábor. FREE VIBRATION OF THIN-WALLED BEAMS. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 48, n. 1, p. 99–110, 2004. Disponível em: https://pp.bme.hu/me/article/view/1361. Acesso em: 10 apr. 2025.