@article{DAN_1965_161_1_a0,
     author = {V. I. Arnol'd},
     title = {Applicability conditions and an error bound for the averaging method for systems in the process of evolution through a resonance},
     journal = {Doklady Akademii Nauk},
     pages = {9--12},
     publisher = {mathdoc},
     volume = {161},
     number = {1},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_161_1_a0/}
}