IBRAHIM, R. W. A NEW SYMMETRIC DIFFERENTIAL OPERATOR OF NORMALIZED FUNCTIONS WITH APPLICATIONS IN IMAGE PROCESSING. Journal of Fundamental and Applied Sciences, [S. l.], v. 12, n. 2, p. 852–864, 2020. DOI: 10.4314/jfas.v12i2.22. Disponível em: https://jfas.info/index.php/JFAS/article/view/551. Acesso em: 31 jan. 2025.