Convergence of the Ritz method in the problem of free vibrations of a thin-walled spherical shell under various boundary conditions of its attachment. Neliniini Kolyvannya, [S. l.], v. 27, n. 4, p. 550–565, 2024. DOI: 10.3842/nosc.v27i4.1489. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1166. Acesso em: 6 dec. 2025.