F.M. MOHAMMAD, H. Recognition of Printed Arabic Character Using Gray- Scale Matrices. Journal of Education and Science, [S. l.], v. 18, n. 4, p. 157–167, 2006. DOI: 10.33899/edusj.2006.77663. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42147. Acesso em: 10 sep. 2025.