• [1]

    E. Riordan et al. SLAC-PUB-1634 (1975);W. B. Afwood et al., Phys. Lett., 64B (1978), 479.[2] H. L. Anderson et al., Phys. Rev. Lett., 37 (1976), 4; 1034 (E). 38 (1977), 1450; 40 (1978),1061.[3] A. J. Buras and H. J. F. Gacmers, Nucl, Phys., B132 (1978), 249, A. J. Buras et al.Nucl.Phys., B131 (1977), 308.[4] I. Hinchliffe and C, H. Llewellvn Smith, Nucl. Phys., B128 (1977), 93.[5] A. de. Rujula, H. Georgi and H.D. Politzer, Ann. Phys., 163 (1977), 315.[6] G. C. Fox, Nucl. Phys., B131 (1977), I97.[7] M.Zravek et al., Plays. Rev, D19(1919), 820.[8] P. V. Landshoff et al., Ref. TH-2157-CERN (1976).[9] S. D. Drell and T-M Yan, Phys. Rev. Lett., 24 (1970),151.[10] R. McElhaney et al., Phys. Rev., D8 (1973), 2267.[11] E. D. Bloom and F. J. Gilman, Phys. Rev., D4 (1971), 3901.