@article{1077378792,
author = {Rudin, Walter},
title = {An extension theorem for positive-definite functions},
journal = {Duke Math. J.},
volume = {37},
number = {1},
year = {1970},
pages = { 49-53},
language = {en},
url = {http://dml.mathdoc.fr/item/1077378792}
}
Rudin, Walter. An extension theorem for positive-definite functions. Duke Math. J., Tome 37 (1970) no. 1, pp. 49-53. http://gdmltest.u-ga.fr/item/1077378792/