Discrete MathematicsVolumes 165–166, 15 March 1997, Pages 421-430ContributionPerfect graphs with unique P4-structureAuthor links open overlay panelStefan HougardyShow moreShareCitehttps://doi.org/10.1016/S0012-365X(96)00188-4Get rights and contentUnder an Elsevier user licenseopen archiveAbstractWe will extend Reed's Semi-Strong Perfect Graph Theorem by proving that unbreakable C5-free graphs different from a C6 and its complement have unique P4-structure.Previous article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1997 Published by Elsevier B.V.