-
[1]
J. Goldstone, Nuovo Cimento, 19(1961), 154, J. Goldstone, A. Salam, S. Weinberg, Phys. Rev., 127(1962), 965.[2] G. S. Guraluik, Phys. Rev. Letter., 13(1964), 295,[3] G. S. Guralnilc, C. R. Hagen and T. W. B. Kibble, "Advances in Particle Physics", Ed. by R. L, Cool. Interscience Publisher (1968).[4] R. F. Streater, Proc. Roy. Soc., (London), A287(1965), 510.[5] See for example Albort lZegsiah. "foluantum Meehnrics", Vol. I, p. 302. North-Holland, Johu WiIeS and Sons, Inc.[6] T. D. Lee and C. N. Yank Phys. Rer., 128 (1962), 885.