NIKOLIĆ, Aleksandar. Bending, buckling, and free vibration analysis of multi-span beams . Engineering TODAY, [S. l.], v. 1, n. 4, 2023. DOI: 10.5937/engtoday2204019N. Disponível em: http://www.engineering-today.com/index.php/et/article/view/25. Acesso em: 9 oct. 2026.