HỒ, N. C.; VINH, L. X. An axiomatization for non-homogeneueous hedge algebras. Journal of Computer Science and Cybernetics, [S. l.], v. 18, n. 4, p. 354–364, 2012. DOI: 10.15625/1813-9663/18/4/1573. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/1573. Acesso em: 4 may. 2024.