Pramanik, D. C., and A. Sarkar. “Uniqueness of Shift and Derivatives of Meromorphic Functions”. Matematychni Studii 61, no. 2 (June 19, 2024): 160-167. Accessed July 15, 2025. http://www.matstud.org.ua/ojs/index.php/matstud/article/view/503.