Majumder, S., and S. Saha. “A Note on the Uniqueness of Certain Types of Differential-Difference Polynomials”.
Ukrains’kyi Matematychnyi Zhurnal 73, no. 5 (May 24, 2021): 679–694. Accessed April 7, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/379.