@article{MZ_1976__148_172359,
     author = {Christian Berg},
     title = {On the {Support} of the {Measures} in a {Symmetric} {Convolution} {Semigroup.}},
     journal = {Mathematische Zeitschrift},
     pages = {141--146},
     publisher = {mathdoc},
     volume = {148},
     year = {1976},
     zbl = {0309.60009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__148_172359/}
}