TY  - JOUR
AU  - Asaf Shapira
TI  - Every orientation of a 4-chromatic graph has a non-bipartite acyclic subgraph
JO  - The electronic journal of combinatorics
PY  - 2022
VL  - 29
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.37236/10727/
DO  - 10.37236/10727
ID  - 10_37236_10727
ER  -