A. M. H. Gerards, Gábor Maróti, Alexander Schrijver. Note On: N. E. Aguilera, M. S. Escalante, G. L. Nasini, A Generalization of the Perfect Graph Theorem Under the Disjunctive Index . Math. Oper. Res., 28(4):884-885, 2003. [doi]
Abstract is missing.