@article{AM2_1971__7_136266,
     author = {R.L. HALL},
     title = {On {Single-Product} {Functions} with {Rotational} {Symmetry} {(Short} {Communication)}},
     journal = {Aequationes mathematicae},
     pages = {324--325},
     publisher = {mathdoc},
     volume = {7},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__7_136266/}
}