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@article{MS2_1976__39_166484, author = {David E. Evans}, title = {On the spectrum of a one-parameter strongly continous representation.}, journal = {Mathematica Scandinavica}, pages = {80--82}, publisher = {mathdoc}, volume = {39}, year = {1976}, zbl = {0356.47023}, url = {http://geodesic.mathdoc.fr/item/MS2_1976__39_166484/} }
David E. Evans. On the spectrum of a one-parameter strongly continous representation.. Mathematica Scandinavica, Tome 39 (1976), pp. 80-82. http://geodesic.mathdoc.fr/item/MS2_1976__39_166484/