KỶ, Nguyễn Ngọc. Method of structural representation of characters using vectorisation. Journal of Computer Science and Cybernetics, [S. l.], v. 16, n. 1, p. 72–79, 2013. DOI: 10.15625/1813-9663/16/1/2854. Disponível em: https://vjs.ac.vn/jcc/article/view/2854. Acesso em: 30 apr. 2025.