خليل إبراهيم س. Recognition using Chain Code. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 11, n. 2, p. 691–713, 2011. DOI: 10.33899/iqjoss.2011.027842. Disponível em: https://ojs.uomosul.edu.iq/index.php/stats/article/view/29397. Acesso em: 5 sep. 2025.