%0 Journal Article
%A G. I. Kabak
%T Lower bounds for the minimum number of switching points
%J Differencialʹnye uravneniâ
%D 1984
%P 1088-1090
%V 20
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1984_20_6_a21/
%G ru
%F DE_1984_20_6_a21