TOÀN, Đỗ N. An algorithm to detect region and its implementation in automatic vectorizing process. Journal of Computer Science and Cybernetics, [S. l.], v. 16, n. 1, p. 45–51, 2013. DOI: 10.15625/1813-9663/16/1/2850. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/2850. Acesso em: 1 may. 2024.