@article{CMFD_2017_63_3_a8,
     author = {M. B. Sevryuk},
     title = {Partial preservation of frequencies and floquet exponents of invariant tori in the reversible {KAM} context~2},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {516--541},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2017_63_3_a8/}
}