Brzychczy S, Prykarpatsky AK, Samoilenko VG. Finite-Dimensional Reductions of Conservative Dynamical Systems and Numerical Analysis. I. Ukr. Mat. Zhurn. [Internet]. 2001 Feb. 25 [cited 2025 Apr. 13];53(2):220-8. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4237