%0 Journal Article %A Istratescu, V. %A Istratescu, I. %T On bare and semibare points for some classes of operators %J Portugaliae mathematica %D 1970 %P 205-211 %V 29 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1970__29_4_115129/ %G en %F PORMA_1970__29_4_115129