Богачев, В. Е., Кириченко, И. К., Чеканова, Н. Н. and Чеканов, Н. А. (2015) “Investigation of nonlinear Hamiltonian systems by the normal form of the Birkhoff-Gustavson”, Bulletin of V.N. Karazin Kharkiv National University, series «Mathematical modeling. Information technology. Automated control systems», 26(1156), pp. 17-28. Available at: https://periodicals.karazin.ua/mia/article/view/14210 (Accessed: 19May2024).