@article{MAN_1982__259_163644,
     author = {S. Kantorovitz and R.J. Hughes},
     title = {Spectral {Representation} of {Local} {Semigroups.}},
     journal = {Mathematische Annalen},
     pages = {455--470},
     publisher = {mathdoc},
     volume = {259},
     year = {1982},
     zbl = {0468.47026},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__259_163644/}
}