KorzhS. A., OvcharenkoI. E., and UgrinovskiiR. A. “Chebyshev’s Recursion: Analytic Principles and Applications”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 5 (May 25, 1993): 626–646. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5851.