LEKOMTSEV, Sergey Vladimirovich. Finite-element algorithms for calculation of natural vibrations of three-dimensional shells. Computational Continuum Mechanics, Perm, Russia, v. 5, n. 2, p. 233–243, 2012. DOI: 10.7242/1999-6691/2012.5.2.28. Disponível em: https://journal-dev.icmm.ru/index.php/ccm/article/view/CCMv5n2a28. Acesso em: 13 may. 2026.