@article{JRAM_1971__248_151113,
     author = {P. Wynn},
     title = {On an extension of a result due to {P\'olya.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {127--132},
     publisher = {mathdoc},
     volume = {248},
     year = {1971},
     zbl = {0219.30002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1971__248_151113/}
}