-
[1]
A.Belavin,A.Polyakov,A.Schwartz,Y.Tyupking,Phys.Lett,59B(1975)85;M.F.Atiyah,V.G.Drinfeld,N.J.Hitching and Yu.I.Manin,Phys.Lett,65A(1978)185;M.F.AtiyahandR.S.Ward,Commun Math.Phys,55(1977)117.[2] E.Witten,Phys.Lett,77B(1978)394;M.Sohnius.Nucl.Phys,B136(1978)461;LV.Volovich,Phys.Lett,129B(1983)429;Theore.Matk.Phys,57(1983)1269;C.Devchand,Nucl.Phys.,B238(1984)333,L.L.Chan,M.L.GeandC.S.Lim,Phys.Rev.,33(1986)1056.[3] L.L.Chau,Phys. Lett.,202B(1988)238;L.L.Chau,C.S.Lim,Phys Rev.Lett,56(1986)294.[4] B.Y.Hou and L.Chao,NWU-IMP-920520.[5] I.J.Mason,G.A.J.Sparling,Phys.Lett,137A(1989)29;R.S.Ward,Phil.Tran.Roc.Soc.Lond,A315(1985)451,L.L.ChauandI.Yamanaka,UC Davispreprint 1991.[6] L.L.Chau,in Nankai lectureson Math.Phys.,”Integrable System“,1987,ed.X.C.Song,by World Scientific.[7] C.N.Yang,Phys.Rev.Lett,38(1977)1377,S.Ward.Phys Lett,61A(1977)81.[8] B.Y.Hou and X.C.Song,Stony Brookpreprint 1983,unpublished,V.P.Nair,J.Schiff,Phys.Lett,246B(1990).