TY  - JOUR
AU  - O. V. Borodin
TI  - A proof of Gr\"unbaum's conjecture on the acyclic $5$-colorability of planar graphs
JO  - Doklady Akademii Nauk
PY  - 1976
SP  - 18
EP  - 20
VL  - 231
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1976_231_1_a2/
LA  - ru
ID  - DAN_1976_231_1_a2
ER  -