WESOŁOWSKI, Z. Harmonic Wave in Disturbed System of Periodic Elastic Layers. Engineering Transactions, [S. l.], v. 45, n. 3-4, p. 471–486, 1997. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/1439. Acesso em: 9 oct. 2025.