Cao, T. B., Liu, K. and Liu, X. L. (2017) “The properties on differential-difference polynomials”, Ukrains’kyi Matematychnyi Zhurnal, 69(1), pp. 71-82. Available at: http://umj.imath.kiev.ua/index.php/umj/article/view/1676 (Accessed: 28September2022).