Khader, Salima Mohamed. “New Forms of Continuity (δ-α-Continuous and Contra δ-α-Continuous)”. Scientific Journal of Faculty of Education, Misurata University , vol. 3, no. 02, Sept. 2016, pp. 14-23, https://journals.misuratau.edu.ly/edu/ojs/index.php/eduction/article/view/515.