V.S. Subha, N. Thillaigovindan, V. Chinnadurai, and P. Dhanalakshmi. 2020. “Rough Fuzzy Bi-interiorideal(biquasi-Ideal) of Semigroup”. Malaya Journal of Matematik 8 (02). India:517-21. https://doi.org/10.26637/MJM0802/0033.