@article{10_4064_am_19_3_4_399_411,
     author = {H. D. O. F. Gronau and W. Just and W. Schade and Petra Scheffler and J. Wojciechowski},
     title = {Path systems in acyclic directed graphs},
     journal = {Applicationes Mathematicae},
     pages = {399--411},
     publisher = {mathdoc},
     volume = {19},
     number = {3-4},
     year = {1987},
     doi = {10.4064/am-19-3-4-399-411},
     zbl = {0718.05031},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-19-3-4-399-411/}
}