@article{DAN_1965_165_6_a6,
     author = {V. K. Mel'nikov},
     title = {On certain cases of conservation of almost periodic motions with a small change of the {Hamiltonian} function},
     journal = {Doklady Akademii Nauk},
     pages = {1245--1248},
     publisher = {mathdoc},
     volume = {165},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_6_a6/}
}