Eigenfrequencies of the reinforced concrete beams – methods of calculations. Journal of Civil Engineering and Management, [S. l.], v. 17, n. 2, p. 278–283, 2011. DOI: 10.3846/13923730.2011.576812. Disponível em: https://journals.vilniustech.lt/index.php/JCEM/article/view/5162. Acesso em: 9 may. 2025.