[1]
“Estimating the number of perturbed subharmonics in a system that is close to a Hamiltonian system and having one and a half degrees of freedom”, НК, vol. 14, no. 2, pp. 147–180, Jun. 2011, Accessed: Jan. 21, 2026. [Online]. Available: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/598