Tatevyan, S., N. Sorokin, and S. Zaljotkin. “Construction of Polynomial Approximations for Numerical Solution of Ordinary Differential Equations”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 2, no. 2, May 2001, pp. 56-64, https://en.num-meth.ru/index.php/journal/article/view/20.