TY  - JOUR
AU  - Martin Aigner
TI  - On the Linegraph of a Directed Graph.
JO  - Mathematische Zeitschrift
PY  - 1967
SP  - 56
EP  - 61
VL  - 102
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1967__102_170859/
ID  - MZ_1967__102_170859
ER  -