HÁN, L. Q. On Abellian group languages. Journal of Computer Science and Cybernetics, [S. l.], v. 17, n. 3, p. 65–69, 2012. DOI: 10.15625/1813-9663/17/3/2628. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/2628. Acesso em: 17 may. 2024.