Finite difference methods in image processing. Selecciones Matemáticas, [S. l.], v. 8, n. 02, p. 411–416, 2021. DOI: 10.17268/sel.mat.2021.02.17. Disponível em: https://revistas.unitru.edu.pe/index.php/SSMM/article/view/3903. Acesso em: 19 jul. 2026.