ANSARI, Moin Akhtar; KOAM, Ali N.A. ROUGH APPROXIMATIONS IN KU-ALGEBRAS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 40, p. 679–691, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6973. Acesso em: 7 oct. 2026.