@article{ELMA_1990__45_6_141473,
     author = {A. Cannizzo},
     title = {Extension theorems for integral representations of solutions of a functional eqaution.},
     journal = {Elemente der Mathematik},
     pages = {9--14},
     publisher = {mathdoc},
     volume = {45},
     number = {6},
     year = {1990},
     zbl = {0704.39004},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1990__45_6_141473/}
}