GUDRA, Tadeusz. Ultrasounds in gas media: generation, transmission, applications (review paper). Archives of Acoustics, [S. l.], v. 33, n. 4, p. 581–592, 2008. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/555. Acesso em: 25 apr. 2025.