WERNEROWSKI, K. Asymptotic solution of acoustic nonlinear wave equation with friction. Archives of Acoustics, [S. l.], v. 20, n. 3, p. 271–276, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1036. Acesso em: 26 apr. 2025.