@article{MS2_1987__61_2_186108,
     author = {Paul Ressel},
     title = {Integral representations on convex semigroups.},
     journal = {Mathematica Scandinavica},
     pages = {93--111},
     publisher = {mathdoc},
     volume = {61},
     number = {2},
     year = {1987},
     zbl = {0659.43006},
     url = {http://geodesic.mathdoc.fr/item/MS2_1987__61_2_186108/}
}