@article{MM2_1982__37_154843,
     author = {Eberhard Siebert},
     title = {Continuous {Convolution} {Semigroups} {Integrating} a {Submultiplicative} {Function.}},
     journal = {Manuscripta mathematica},
     pages = {383--392},
     publisher = {mathdoc},
     volume = {37},
     year = {1982},
     zbl = {0488.60015},
     url = {http://geodesic.mathdoc.fr/item/MM2_1982__37_154843/}
}