@article{01310580,
title = {A problem concerning a character sum.},
journal = {Experimental Mathematics},
volume = {8},
year = {1999},
pages = {63-72},
doi = {10.1080/10586458.1999.10504389},
zbl = {0938.11061},
language = {en},
url = {http://dml.mathdoc.fr/item/01310580}
}
Teske, Edlyn; Williams, Hugh C. A problem concerning a character sum.. Experimental Mathematics, Tome 8 (1999) pp. 63-72. doi : 10.1080/10586458.1999.10504389. http://gdmltest.u-ga.fr/item/01310580/