@article{AM2_1981__23_136898,
     author = {D. Suryanarayana},
     title = {Note on the functional equation. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {123--124},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136898/}
}