Ramadhan, Ali Mohammed, and Najah Ali Jiben Al-Ziadi. “New Class of Multivalent Functions With Negative Coefficients”. Earthline Journal of Mathematical Sciences 10, no. 2 (July 10, 2022): 271-288. Accessed May 11, 2024. https://earthlinepublishers.com/index.php/ejms/article/view/548.