%0 Journal Article %A Bernard Gelbaum %T On a class of operators in Hilbert space %J Studia Mathematica %D 1970 %P 279-284 %V 38 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-38-1-279-284/ %R 10.4064/sm-38-1-279-284 %G en %F 10_4064_sm_38_1_279_284