- [1]
A. A. Migdal, Zhete (USSR), 69(1975), 810.[2] A. M. Polyakov, Phys. Lett., B59(1975), 79.[3] F. GreenS. Samuel, Nucl. Phys., B190(1981). 113.[4] A. M. Horowity, Nucl. Phys., B251(1985), 1.[5] R. Friedberg H-C. Ren, Nucl. Phys., B235(1984), 310.[6] H-C. Ren, Nucl. Phys., 8235(1985), 321.[7] N. H. Christ, R. FriedbergT. D. Lee, Nucl. Phys., B202(1982), 89; B210(1982), 310; B210(1982),337.[8] K. G. Wilson, Phys. Rev., D10(1974), 2445.[9] M. Creutz, Phys. Rev., D21(1980), 2308.