%0 Journal Article
%A V. V. Amel'kin
%A Z. D. Ching
%T Strong isochronism of the center of dynamical systems with incomplete polynomials of the third degree
%J Differencialʹnye uravneniâ
%D 1993
%P 1057-1060
%V 29
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1993_29_6_a16/
%G ru
%F DE_1993_29_6_a16