%0 Journal Article %A Christopher R. H. Hanusa %T A Gessel--Viennot-type method for cycle systems in a directed graph %J The electronic journal of combinatorics %D 2006 %V 13 %U http://geodesic.mathdoc.fr/articles/10.37236/1063/ %R 10.37236/1063 %F 10_37236_1063