LEVSHIN, A. L.; PANZA, G. F. Further Remarks on Extra Roots of Rayleigh Equation and Somigliana Waves. Annals of Geophysics, [S. l.], v. 23, n. 1, p. 45–55, 1970. DOI: 10.4401/ag-5142. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5142. Acesso em: 14 jul. 2024.