1. K. Arasu, J. Dillon, K. Player, Character sum factorizations yield perfect sequences, preprint, 2010.
2. Design Theory. Vol. I;Beth,1999
3. Cyclic relative difference sets and their p-ranks;Chandler;Des. Codes Cryptogr.,2003
4. The invariant factors of some cyclic difference sets;Chandler;J. Combin. Theory Ser. A,2003
5. Direct product difference sets;Ganley;J. Combin. Theory Ser. A,1977