TY  - JOUR
AU  - KÁROLY BEZDEK
TI  - A remark about the directed line-elements in the plane
JO  - Beiträge zur Algebra und Geometrie
PY  - 1986
SP  - 89
EP  - 94
VL  - 22
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/BAG_1986__22_138338/
ID  - BAG_1986__22_138338
ER  -