WAI-CHI, W.; AZID, A.A.; MAJLIS, B.Y. Formulation of stiffness constant and effective mass for a folded beam. Archives of Mechanics, Warsaw, Poland, v. 62, n. 5, p. 405–418, 2010. Disponível em: https://am.ippt.pan.pl/index.php/am/article/view/v62p405. Acesso em: 7 dec. 2025.