• [1]

    F. D. M. Haldane, Phys. Rev. Lett, 50(1983), 1153.[2] I. Affleck, Phys, Rev, Lett., 56(1986), 408.[3] M. L. Ge and Y. Niu, Kexureongbao, 34(1989), 1131; J. Phys. A, to be published.[4] 高孝纯等,高能物理与核物理,13(1989),526,[5] E. Manousakis et aL; Phys. Rev, Lett.; 62(1989), 1310.