TY  - JOUR
AU  - F. Ya. Vetukhnovskii
TI  - On the coverings of a graph by a system of neighborhoods of its vertices
JO  - Doklady Akademii Nauk
PY  - 1964
SP  - 21
EP  - 24
VL  - 158
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1964_158_1_a3/
LA  - ru
ID  - DAN_1964_158_1_a3
ER  -