Korzh, S. A., I. E. Ovcharenko, and R. A. Ugrinovskii. “Chebyshev’s Recursion: Analytic Principles and Applications”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 45, no. 5, May 1993, pp. 626–646, https://umj.imath.kiev.ua/index.php/umj/article/view/5851.