BakanA. G., and HolubA. P. “On Sequences That Do Not Increase the Number of Real Roots of Polynomials”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 10 (October 25, 1993): 1323–1331. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5937.