%0 Journal Article
%A A. I. Schetnikov
%T A Sum of Angles of a Self-intersecting Polygon
%J Matematičeskoe obrazovanie
%D 2004
%P 78-86
%V 28
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MO_2004_28_1_a2/
%G ru
%F MO_2004_28_1_a2