THẢO, N. X.; ĐỊNH, N. V. Rough picture fuzzy set and picture fuzzy topologies. Journal of Computer Science and Cybernetics, [S. l.], v. 31, n. 3, p. 245, 2015. DOI: 10.15625/1813-9663/31/3/5046. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/5046. Acesso em: 7 oct. 2022.