%0 Journal Article
%A Asaf Shapira
%T Every orientation of a 4-chromatic graph has a non-bipartite acyclic subgraph
%J The electronic journal of combinatorics
%D 2022
%V 29
%N 1
%U http://geodesic.mathdoc.fr/articles/10.37236/10727/
%R 10.37236/10727
%F 10_37236_10727