DUNN, F.; LAW, W. K.; FRIZZELL, L. A. The ultrasonic nonlinearity parameter for biological media. Archives of Acoustics, [S. l.], v. 9, n. 1-2, p. 29–34, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3184. Acesso em: 14 may. 2025.