@article{GDZPPN002483629,
title = {A Criterion for an Operator with Real Spectrum to Be of Scalar-type.},
journal = {Monatshefte f\"ur Mathematik},
volume = {95},
year = {1983},
pages = {229-234},
zbl = {0507.47020},
url = {http://dml.mathdoc.fr/item/GDZPPN002483629}
}
Ricker, Werner. A Criterion for an Operator with Real Spectrum to Be of Scalar-type.. Monatshefte für Mathematik, Tome 95 (1983) pp. 229-234. http://gdmltest.u-ga.fr/item/GDZPPN002483629/