%0 Journal Article
%A P. Yu. Suvorov
%T Representation of proof s' by coloured graphs and Hadwiger hypothesis
%J Zapiski Nauchnykh Seminarov POMI
%D 1979
%P 209-217
%V 88
%U http://geodesic.mathdoc.fr/item/ZNSL_1979_88_a16/
%G ru
%F ZNSL_1979_88_a16