%0 Journal Article
%A A. E. Gel'man
%T The approximate determination of periodic modes in high frequency processes
%J Differencialʹnye uravneniâ
%D 1968
%P 1396-1403
%V 4
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_8_a3/
%G ru
%F DE_1968_4_8_a3