%0 Journal Article
%A I. N. Sergeev
%T The definition of the indices of oscillation, rotation, and wandering of nonlinear differential systems
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 2021
%P 41-46
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_2021_3_a5/
%G ru
%F VMUMM_2021_3_a5