%0 Journal Article %A R. F. Galeeva %A N. I. Chernov %T Conditions of strict exponential growth of the number of cycles in countable directed graphs %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1991 %P 172-173 %V 46 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1991_46_4_a7/ %G en %F RM_1991_46_4_a7