Shaker, Ghazwan Farhan, and Raad Aziz Hussain Al-Abdulla. “Sf-Covering Dimension and Sf-Local Dimension”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 14, no. 3, Aug. 2022, pp. Math Page 19-32, doi:10.29304/jqcm.2022.14.3.992.