TY  - JOUR
AU  - O. V. Borodin
TI  - A~structural theorem on planar graphs and its application to coloring
JO  - Diskretnaya Matematika
PY  - 1992
SP  - 60
EP  - 65
VL  - 4
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DM_1992_4_1_a5/
LA  - ru
ID  - DM_1992_4_1_a5
ER  -