PHONG, Phan Anh; KHANG, Trần Đình. A representation for hedge algebraic type 2 fuzzy sets. Journal of Computer Science and Cybernetics, [S. l.], v. 26, n. 1, p. 29–44, 2012. DOI: 10.15625/1813-9663/26/1/476. Disponível em: https://vjs.ac.vn/jcc/article/view/476. Acesso em: 30 apr. 2025.