PRYKARPATSKY, A. K.; SAMOILENKO, V. G.; TANERI, U. The Reduction Method in the Theory of Lie-Algebraically Integrable Oscillatory Hamiltonian Systems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 2, p. 232–240, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3901. Acesso em: 11 apr. 2025.