NADIR GEORGE MANSOUR, MUNIR ABDUL KHALIK AZIZ, & SHADMAN RAHMAN KAREM. (2020). The constriction of topological spaces from fuzzy topological spaces. مجلة المستنصرية للعلوم والتربية, 17(3), 303–310. استرجع في من https://edumag.uomustansiriyah.edu.iq/index.php/mjse/article/view/47