ET. AL., R. T. Triangular Vertex Transform Based Watermarking on Contourlet Coefficients for Improved Robustness. Turkish Journal of Computer and Mathematics Education (TURCOMAT), [S. l.], v. 12, n. 3, p. 5434–5442, 2021. Disponível em: https://turcomat.org/index.php/turkbilmat/article/view/2191. Acesso em: 6 may. 2024.