Prasertpong R, Buada S. Rough Interior Ideals and Rough Quasi-Ideals in Approximation Spaces of Semigroups under Preorder and Compatible Relations. Suan Sunandha Sci & Tech [internet]. 2022 Dec. 8 [cited 2025 Apr. 3];8(1):21-6. available from: https://li02.tci-thaijo.org/index.php/ssstj/article/view/381