%0 Journal Article
%A Martin Aigner
%T On the Linegraph of a Directed Graph.
%J Mathematische Zeitschrift
%D 1967
%P 56-61
%V 102
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1967__102_170859/
%F MZ_1967__102_170859