%0 Journal Article
%A F. I. Mamedova
%T Simplest singular points of $1$-forms invariant with respect to actions of a third-order group
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 2018
%P 60-63
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_2018_5_a7/
%G ru
%F VMUMM_2018_5_a7