%0 Journal Article %A Klaus Gero Kalb %T Characterization Of Certain ....-Self-Adjoint Operators By Means Of Their Exponential Function. %J Revista colombiana de matematicas %D 1979 %P 193-206 %V 13 %I mathdoc %U http://geodesic.mathdoc.fr/item/RCM_1979__13_181684/ %F RCM_1979__13_181684