TY  - JOUR
AU  - V. A. Liskovets
TI  - The number of strongly connected directed graphs
JO  - Matematičeskie zametki
PY  - 1970
SP  - 721
EP  - 732
VL  - 8
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1970_8_6_a4/
LA  - ru
ID  - MZM_1970_8_6_a4
ER  -