• [1]

    M. A. Shifman, A. I. Vainshtein and V.I.Zaknarov, Nucl. Phys., B147(1979),385; B147(1979), 448;B147(1979), 519.[2] T. I. Larsson, Phys. Rev., D32(1984), 956;T. Huang and Z. Huang, Phys. Rev.,D39(1988), 1213.L. J. Reinders, H. Rubinstein and S. Yazaki, Phys, Rep., 127(1985), 1.[3] M. A. Shifman, Nucl. Phys., B173(1980), 13.[4] V. A. Novikov, M. A. Shifman et al., F. Phys., 32(1982), 585.[5] F. J. Yndurain, Quantum Chromodynamics, edited by W. Beiglbock et al.(Springer, New York, 1983),Chap. IV.[6] V.l.Chernyak and A. R. Zhitnitskii, Phys. Rep., 112(1984), 173.