[1]
Y. V. Loveikin and I. O. Parasyuk, “Invariant tori of locally Hamiltonian systems close to conditionally integrable systems”, Ukr. Mat. Zhurn., vol. 59, no. 1, pp. 71–98, Jan. 2007, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3292