MAŁECKI, Ignacy. How the structure of a medium is seen by an acoustic wave*. Archives of Acoustics, [S. l.], v. 4, n. 2, p. 131–140, 2016. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3372. Acesso em: 13 jan. 2025.