Al-shami, Tareq M., Abdelwaheb Mhemdi, Mohammed Jameel, and Mohamed Abouhawwash. “Supra B Limit Points and Supra B Separation Axioms”. European Journal of Pure and Applied Mathematics 15, no. 1 (January 31, 2022): 15–29. Accessed January 28, 2023. https://www.ejpam.com/index.php/ejpam/article/view/4260.