1. Symmetric Hadamard matrices of order 36;Bussemaker;Ann. New York Acad. Sci.,1970
2. P.G. Casazza, J. Kovacevic, Uniform tight frames with erasures, preprint
3. J.H. Conway, R.H. Hardin, N.J.A. Sloane, Packing lines, planes, etc.: packings in Grassmannian spaces, preprint
4. in: Sphere Packings Lattices and Groups, third ed.;Conway,1999
5. M. Fickus, Constructions of normalized tight frames, preprint