@article{120060, author = {Dina \v St\v erbov\'a}, title = {On the spectral properties of elements of the type exp(ih) in Hermitian Banach algebras}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {17}, year = {1978}, pages = {109-114}, zbl = {0433.46041}, mrnumber = {0554041}, language = {en}, url = {http://dml.mathdoc.fr/item/120060} }
Štěrbová, Dina. On the spectral properties of elements of the type exp(ih) in Hermitian Banach algebras. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 17 (1978) pp. 109-114. http://gdmltest.u-ga.fr/item/120060/
Complete Normed Algebras, Springer-Verlag 1973. (1973) | MR 0423029 | Zbl 0271.46039
Normirovannyje kolca, Moskva 1968. (1968)
On the imbedding of normed rings into the ring of operators on Hilbert space, Mat. Sborník 12, 197-213 (1943). (1943) | MR 0009426
Banach algebras with involution, Manuscripta math. 6, p. 245-290 (1972), Springer-Verlag. (1972) | MR 0296705
On the spectral radius in Banach algebras with involution, Bull. Lond. Math. Soc. 2, p. 327-334 (1970). (1970) | MR 0275175