TY  - JOUR
AU  - Zdeněk Dvořák
AU  - Daniel Král'
TI  - On planar mixed hypergraphs
JO  - The electronic journal of combinatorics
PY  - 2001
VL  - 8
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1579/
DO  - 10.37236/1579
ID  - 10_37236_1579
ER  -