CƯỜNG, B. C. Picture fuzzy sets. Journal of Computer Science and Cybernetics, [S. l.], v. 30, n. 4, p. 409, 2014. DOI: 10.15625/1813-9663/30/4/5032. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/5032. Acesso em: 23 apr. 2024.