1. T.H. Andres, R.G. Stanton, Golay sequences, in: Lecture Notes in Mathematics, vol. 622, Springer, New York, Berlin, 1997.
2. Orthogonal matrices with zero diagonal II;Delsarte;Can. J. Math.,1971
3. Contemporary Design Theory, A Collection of Surveys;Dinitz,1992
4. Circulant modular Hadamard matrices;Eliahou;Ens. Math.,2001
5. Modular sequences and modular Hadamard matrices;Eliahou;J. Comb. Designs,2001