@article{1077474862,
author = {Cohen, Eckford},
title = {Sums of an odd number of squares in $GF[p^n, x]$},
journal = {Duke Math. J.},
volume = {15},
number = {1},
year = {1948},
pages = { 501-511},
language = {en},
url = {http://dml.mathdoc.fr/item/1077474862}
}
Cohen, Eckford. Sums of an odd number of squares in $GF[p^n, x]$. Duke Math. J., Tome 15 (1948) no. 1, pp. 501-511. http://gdmltest.u-ga.fr/item/1077474862/