@article{AM2_1977__15_136654,
     author = {Thomas A. O'Connor},
     title = {A solution of the {D'Alembert's} functional equation on a locally compact {Abelian} group.},
     journal = {Aequationes mathematicae},
     pages = {235--238},
     publisher = {mathdoc},
     volume = {15},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136654/}
}