High-Order Symplectic and Symmetric Composition Methods for Multi-Frequency and Multi-Dimensional Oscillatory Hamiltonian Systems. Journal of Computational Mathematics, [S. l.], v. 33, n. 4, p. 356–378, 2018. DOI: 10.4208/jcm.1502-m2014-0082. Disponível em: https://global-sci.com/index.php/JCM/article/view/12202. Acesso em: 5 dec. 2025.