@article{GDZPPN002540215,
title = {Characterization Of Certain ....-Self-Adjoint Operators By Means Of Their Exponential Function.},
journal = {Revista colombiana de matematicas},
volume = {13},
year = {1979},
pages = {193-206},
zbl = {0438.47038},
url = {http://dml.mathdoc.fr/item/GDZPPN002540215}
}
Kalb, Klaus Gero. Characterization Of Certain ....-Self-Adjoint Operators By Means Of Their Exponential Function.. Revista colombiana de matematicas, Tome 13 (1979) pp. 193-206. http://gdmltest.u-ga.fr/item/GDZPPN002540215/