Stability of a canonical system with two degrees of freedom in the presence op resonance: PMM vol. 32, n≗4, 1968, pp. 738–744

@inproceedings{Markeev1968StabilityOA,
  title={Stability of a canonical system with two degrees of freedom in the presence op resonance: PMM vol. 32, n≗4, 1968, pp. 738–744},
  author={A. P. Markeev},
  year={1968}
}