BedratyukL. P. “Derivations and Identities for Kravchuk Polynomials”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 12 (December 25, 2013): 1587–1603. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2539.