TY  - JOUR
AU  - P. Yu. Suvorov
TI  - Representation of proof s' by coloured graphs and Hadwiger hypothesis
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1979
SP  - 209
EP  - 217
VL  - 88
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1979_88_a16/
LA  - ru
ID  - ZNSL_1979_88_a16
ER  -