• [1]

    E. Witten, Nucl. Phys., B223 (1983 ), 422.[2] J. bless and B. Zumino, Phys. Lett., 37B(1971), 95.[3] T. H. R. Skyrme, Proc. Roy. Soc. (London), A260(1961), 127.[4] E. Witten, Nucl. Phys., B223(1983), 433.G W. Adkins, C. R. Nappi and E. Witten, ibid., B228(1983), 552.[5] K. C. Chou, H. Y. Guo, K. Wu and X. C. Song, Phys. Lett., 134B (1984), 67; Institute of Theoretical Physics, Academia Sinica preprint AS-ITP-83-032; 033; Stony Brook preprint ITP SB84-18.[6] B. Zumino, Les Houches lectures 1983, LBL16747 (1983).B. Zumino, Y. S. Wu and A. Zee, Nucl. Phys. (to be published).[7] K. Kawai and S. -H. H. Tye, Cornen preprint CLNS-841595.[8] Y. P. Kuang, X. Y. Li, K. Wu and Z. Y. Zhao, preprint AS-ITP-84-015.[9] C. H. Chang, H. Y. Guo and K. Wu, preprint AS-ITP-84-016.[10] J. Goldstone and F. Wiluek, Phys. Rev. Lett., 47(1981), 986.[11] A. Zee, Phys. Lett., 135B(1984), 307. F. Wiluek and A. Zee, Phys. Rev. Lett., 51(1983), 2250. 1[12] 例如见 T. Eguchi, P. B. Gikey and A. J. Hanson, Phys. Reports, 66(1980), 213,及其中所引文献.[13] D. J. Gross and R. Jackiw, Phys. Rev., D6(1972), 477.