BARTUZEL, G.; FRYSZKOWSKI, A. Pointwise Comparison Principle for clamped Timoshenko beam. Topological Methods in Nonlinear Analysis, [S. l.], v. 39, n. 2, p. 335–359, 2012. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2012.018. Acesso em: 24 oct. 2021.