CHIVERS, Robert C. Quantitative image indices in ultrasonic diagnostics of inbomogeneous materials. Archives of Acoustics, [S. l.], v. 6, n. 2, p. 147–162, 1981. Disponível em: https://acoustics.ippt.gov.pl/index.php/aa/article/view/3303. Acesso em: 4 mar. 2026.