@article{10.30755/NSJOM.08786,
     author = {Heyam H. Al-jarrah and Amani Al-rawshdeh and Eman M. Al-saleh and Khalid Y. Al-zoubi},
     title = {Characterization of $R\omega O(X)$ sets by using ${\delta{\omega}}-$cluster points
},
     journal = {Novi Sad Journal of Mathematics},
     pages = {109 - 122},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {2019},
     doi = {10.30755/NSJOM.08786},
     url = {http://geodesic.mathdoc.fr/articles/10.30755/NSJOM.08786/}
}