@article{05617063, title = {Twelfth power qualified residue difference sets.}, journal = {Integers}, volume = {9}, year = {2009}, pages = {401-410}, doi = {10.1515/INTEG.2009.032}, zbl = {1171.05309}, language = {en}, url = {http://dml.mathdoc.fr/item/05617063} }
Byard, Kevin. Twelfth power qualified residue difference sets.. Integers, Tome 9 (2009) pp. 401-410. doi : 10.1515/INTEG.2009.032. http://gdmltest.u-ga.fr/item/05617063/