%0 Journal Article %A P. P. Zabreiko %A I. B. Ledovskaya %T Higher order approximations of the averaging method of N. N. Bogoljubov–N. M. Krylov %J Doklady Akademii Nauk %D 1966 %P 262-265 %V 171 %N 2 %U http://geodesic.mathdoc.fr/item/DAN_1966_171_2_a4/ %G ru %F DAN_1966_171_2_a4