SMIRNOV, Andrey L.; VASILIEV, Grigoriy P. Natural frequencies of an inhomogeneous square thin plate. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, [S. l.], v. 8, n. 2, p. 212–219, 2021. DOI: 10.21638/spbu01.2021.202. Disponível em: https://math-mech-astr-journal.spbu.ru/article/view/11470. Acesso em: 18 may. 2024.