@article{SF_1984__29_134670,
     author = {R. Viertl},
     title = {Borel semigroups and probabilities.},
     journal = {Semigroup forum},
     pages = {17--34},
     publisher = {mathdoc},
     volume = {29},
     year = {1984},
     zbl = {0539.60015},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__29_134670/}
}