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    A. Zee, Phys. Rev. Lett., 42 (1979), 417; S. L. Adler, Phys. Rev. Lett., 44(1980), 1567.[2] 例如见S. Deaer, Gauge T'heoriea and Modern Field Theory Ed. by R. Arnowitt and P. Nath, 1976. MIT Presa.[3] Y. M. Cho, J. Math. Phys., 16 (1975), 2029;L. N. Chang. A. I. Maerae and F. Manaouri, Phys. Rev., D13 (1976), 253;郭汉英,科学通报,23(1978), 407.[4] R. Kerner, Group Theoretical Methods in Physics., Lecture Notes in Phyaics, Vol. 50: Ed. by A.Janner et al., 1976 ; Springer-Verlag. Lu Qi-keng, Wu Yong-shi, and Wu Jian-shi, Proceedings of the 1980, Guanezhou Conference on Theoretical Particle Physics, Vol. 2 (1980), Science Press.[5] 例如见G. W. Gibbons, General Reletivity, An Einstein Centenary Survey, Ed. by S. W. Hawking and W. Israel, 1979, Cambridge.[6] B. S. Dewitt, Relatfivity, Groups and Topology Ed. by C. Dewitt and B. Dewitt, 1964, Gordon and Breech;B. S. Dewitt, Phys. Rev., 19C(1975), 297