%0 Journal Article
%A D. S. Malyshev
%T On the number of boundary classes in the 3-colouring problem
%J Diskretnaya Matematika
%D 2009
%P 129-134
%V 21
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DM_2009_21_4_a10/
%G ru
%F DM_2009_21_4_a10