Melgat BM, AL-Khafaji MAK. Fuzzy Neighborhood Systems in Fuzzy Topological Ring. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2020 Jan. 12 [cited 2024 Nov. 21];11(4):Math Page 87– 93. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/651