Atshan, Waggas Galib, Ihsan Ali Abbas, and Sibel Yalcin. “New Concept on Fourth-Order Differential Subordination and Superordination With Some Results for Multivalent Analytic Functions”. Journal of Al-Qadisiyah for Computer Science and Mathematics 12, no. 1 (March 18, 2020): Math Page 96–107. Accessed November 13, 2024. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/681.