S. Brzychczy, A. K. Prykarpatsky, and V. G. Samoilenko, “Finite-Dimensional Reductions of Conservative Dynamical Systems and Numerical Analysis. I”, Ukr. Mat. Zhurn., vol. 53, no. 2, pp. 220–228, Feb. 2001, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4237