%0 Journal Article
%A N. P. Red'kin
%T Minimal contact circuits for characteristic functions of spheres
%J Diskretnaya Matematika
%D 2020
%P 68-75
%V 32
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DM_2020_32_3_a4/
%G ru
%F DM_2020_32_3_a4