El-Shafei, M. E., Abo-elhamayel, M. and Al-shami, T. (2016) “On supra R-open sets and some applications on topological spaces”, Journal of Progressive Research in Mathematics, 8(2), pp. 1237-1248. Available at: http://scitecresearch.com/journals/index.php/jprm/article/view/797 (Accessed: 1May2024).