%0 Journal Article %T Completely positive matrices of order with -graph %A L. Salce %A M. Cedolin %J - %D 2016 %X We characterize completely positive matrices of order five whose associated graph is a -graph not completely positive, unifying and improving results obtained by Xu. We show by counterexamples that two characterizations obtained by Xu are incorrec %K doubly non-negative matrices %K completely positive matrices %K $\widehat{CP}$-graphs %U http://siba-ese.unisalento.it/index.php/notemat/article/view/16605