@article{1077493383,
author = {Loomis, L. H. and Widder, D. V.},
title = {The Poisson integral representation of functions which are
positive and harmonic in a half-plane},
journal = {Duke Math. J.},
volume = {9},
number = {1},
year = {1942},
pages = { 643-645},
language = {en},
url = {http://dml.mathdoc.fr/item/1077493383}
}
Loomis, L. H.; Widder, D. V. The Poisson integral representation of functions which are
positive and harmonic in a half-plane. Duke Math. J., Tome 9 (1942) no. 1, pp. 643-645. http://gdmltest.u-ga.fr/item/1077493383/