TY  - JOUR
AU  - Noah Golowich
AU  - David Rolnick
TI  - Acyclic subgraphs of planar digraphs
JO  - The electronic journal of combinatorics
PY  - 2015
VL  - 22
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.37236/4596/
DO  - 10.37236/4596
ID  - 10_37236_4596
ER  -