@article{DAN_1958_119_5_a3,
     author = {V. A. Grobov},
     title = {A method for averaging standard equations containing a ``quasicyclic'' angular coordinate},
     journal = {Doklady Akademii Nauk},
     pages = {858--860},
     publisher = {mathdoc},
     volume = {119},
     number = {5},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_5_a3/}
}