SZCZEŚNIAK, W. Drgania Swobodne Lepkosprężystej Belki Timoshenki i Tarczy. Engineering Transactions, [S. l.], v. 22, n. 4, p. 669–687, 1974. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/2431. Acesso em: 23 sep. 2025.