%0 Journal Article
%A V. A. Liskovets
%T The number of strongly connected directed graphs
%J Matematičeskie zametki
%D 1970
%P 721-732
%V 8
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1970_8_6_a4/
%G ru
%F MZM_1970_8_6_a4