F.M. MOHAMMAD, H. Recognition of Printed Arabic Character Using Gray- Scale Matrices. Journal of Education and Science (JES), [S. l.], v. 18, n. 4, p. 157–167, 2006. DOI: 10.33899/edusj.2006.77663. Disponível em: https://rjps.uomosul.edu.iq/edusj/article/view/18007. Acesso em: 4 aug. 2025.