A new conjecture about minimal imperfect graphs.

Henry Meyniel Stephan Olariu A new conjecture about minimal imperfect graphs. 244-247 1989 47 J. Comb. Theory, Ser. B 2 http://dx.doi.org/10.1016/0095-8956(89)90024-5 db/journals/jct/jctb47.html#MeynielO89