Chandra Pramanik, Dilip, and Jayanta Roy. “Uniqueness of Meromorphic Functions Sharing a Set of Roots of Unity”. The Journal of the Indian Mathematical Society 87, no. 3-4 (July 1, 2020): 206–218. Accessed April 30, 2024. https://www.informaticsjournals.com/index.php/jims/article/view/25452.