Arushanyan, O.B., and S.F. Zaletkin. “An Implementation of the Chebyshev Series Method for the Approximate Analytical Solution of Second-Order Ordinary Differential Equations”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 20, no. 60 (March 25, 2019): 97–103. Accessed May 2, 2024. https://en.num-meth.ru/index.php/journal/article/view/1005.