• [1]

    N.Seiberg,Commun.Math.Phys.,123(1989),177.[2]M.Jimbo,Commun.Math.Phys.,102(1986),247.[3]M.Jimbo,Lett.Math.Phys.,11(1986),247.[4]M. Chaichan and P. Kulish,Phys. Lett. ,B234(1990),72.[5]R. Floreanini,V. P. Spiridonov,and L. Vinet,Commun. Math. Phys. ,137(1991),149.[6]T. Hayashi , Commun. Math. Phys. ,127 (1990 ) ,129.[7]M. Scheunert, W. Nahm,and V. Rittenberg,J. Math. Phys. ,18(1977),155.