TY  - JOUR
AU  - Udo Hoffmann
TI  - On the Complexity of the Planar Slope Number Problem
JO  - Journal of graph algorithms and applications
PY  - 2017
SP  - 183
EP  - 193
VL  - 21
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00411/
DO  - 10.7155/jgaa.00411
LA  - en
ID  - JGAA_2017_21_2_a2
ER  -