@article{GDZPPN00202652X,
title = {On Single-Product Functions with Rotational Symmetry.},
journal = {Aequationes mathematicae},
volume = {8},
year = {1972},
pages = {281-286},
zbl = {0261.39006},
url = {http://dml.mathdoc.fr/item/GDZPPN00202652X}
}
Hall, R.L. On Single-Product Functions with Rotational Symmetry.. Aequationes mathematicae, Tome 8 (1972) pp. 281-286. http://gdmltest.u-ga.fr/item/GDZPPN00202652X/