TY  - JOUR
AU  - G. Sh. Fridman
TI  - Radially critical directed graphs
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 565
EP  - 568
VL  - 212
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_212_3_a10/
LA  - ru
ID  - DAN_1973_212_3_a10
ER  -