DyavanalR. S., and MathaiM. M. “Uniqueness of Difference-Differential Polynomials of meromorphic functions”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 7 (July 25, 2019): 906-914. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1484.