L. P. Bedratyuk, “Derivations and Identities for Kravchuk Polynomials”, Ukr. Mat. Zhurn., vol. 65, no. 12, pp. 1587–1603, Dec. 2013, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2539