@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/