1. Some new difference sets;Gordon;Canad. J. Math.,1962
2. A theorem in finite projective geometry and some applications to number theory;Singer;Trans. Amer. Math. Soc.,1938
3. On Singer's parametrization and related matters;Turyn;Appl. Res. Lab., Sylvania Electron. Syst., Waltham, MA, Eng. Note,1960
4. Cyclic Difference Sets;Baumert,1971
5. GMW sequences;Scholtz,1983