Galib Atshan, Waggas, and Salwa Kalf Kazim. “On Differential Sandwich Theorems of Multivalent Functions Defined by a Linear Operar”. Journal of Al-Qadisiyah for Computer Science and Mathematics 11, no. 1 (January 28, 2019): Math Page 117 – 123. Accessed September 19, 2024. https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/480.