@article{1077493072,
author = {Schoenberg, I. J.},
title = {Positive definite functions on spheres},
journal = {Duke Math. J.},
volume = {9},
number = {1},
year = {1942},
pages = { 96-108},
language = {en},
url = {http://dml.mathdoc.fr/item/1077493072}
}
Schoenberg, I. J. Positive definite functions on spheres. Duke Math. J., Tome 9 (1942) no. 1, pp. 96-108. http://gdmltest.u-ga.fr/item/1077493072/