1. K.T. Arasu, private communication, July, 2001.
2. K.T. Arasu, K. Player, A family of cyclic difference sets with Singer parameters in characteristic 3, Des. Codes Cryptogr., to appear.
3. E.F. Assmus Jr., Applications of algebraic coding theory to finite geometric problems, in: N.L. Johnson, M.J. Kallaher, C.T. Long (Eds.), Finite Geometries: Proceedings of a conference in honor of T.G. Ostrom, Lecture Notes in Pure and Applied Mathematics, Vol. 82, Dekker, New York, Pullman Washington, 1983, pp. 23–32.
4. T. Beth, D. Jungnickel, H. Lenz, Design Theory, Vol. 1, 2nd Edition, Cambridge University Press, Cambridge, 1999.
5. One certain abelian groups associated with finite projective geometries;Black;Geom. Dedicata,1989