Khalaf, Alias B., Abdulrahman H. Majeed, and Jamil M. Jamil. “Ss-Open Sets and Ss-Continuous Functions”. International Journal of Advanced Mathematical Sciences 2, no. 1 (February 14, 2014): 71–80. Accessed November 21, 2024. https://sciencepubco.com/index.php/IJAMS/article/view/1761.