@article{ND_2006_2_1_a4,
     author = {O. V. Kholostova},
     title = {On bifurcations and stability of resonance periodic motions of hamiltonian systems with one degree of freedom caused by degeneration of the hamiltonian},
     journal = {Russian journal of nonlinear dynamics},
     pages = {89--110},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2006_2_1_a4/}
}