TY  - JOUR
AU  - G. Ts. Akopyan
TI  - Covers and joins of the vertices of a graph by edges
JO  - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki
PY  - 1974
SP  - 461
EP  - 469
VL  - 14
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_2_a16/
LA  - ru
ID  - ZVMMF_1974_14_2_a16
ER  -