%0 Journal Article %A H. D. O. F. Gronau %A W. Just %A W. Schade %A Petra Scheffler %A J. Wojciechowski %T Path systems in acyclic directed graphs %J Applicationes Mathematicae %D 1987 %P 399-411 %V 19 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-19-3-4-399-411/ %R 10.4064/am-19-3-4-399-411 %G en %F 10_4064_am_19_3_4_399_411