1. E. Cartan,Sur la structure des groupes de transformations finis et continus, thesis, Nony, Paris (1894).
2. N.J.A. Sloane, Sci. Amer.250(1), 116 (1984).
3. G. Racah, Phys. Rev.76, 1352 (1949).
4. B.G. Wybourne and M.J. Bowick, Austr. J. Phys. 30, 259 (1977).
5. R.C. King and A.H.A. Al-Qubanchi, J. Phys. A:Math. Gen.14, 15 (1981).