1. S. Ikeda:Tensor, N. S.,24, 60 (1972);27, 183 (1973).
2. As is well known, the theory of nonlocal fields was initiated byH. Yukawa:Phys. Rev.,77, 219 (1950);80, 1047 (1950).
3. This unified field theory belongs to the theory byH. Weyl:S.-B. Preuss. Akad. Wiss., 465 (1918).
4. Y. Mimura:Journ. Sci. Hiroshima Univ.,5 A, 99 (1935);Y. Mimura andH. Takeno:Sci. Rep. Res. Inst. Theor. Phys.,2 (1962).
5. A. Bergman:Progr. Theor. Phys.,49, 667 (1973);R. Utiyama:Progr. Theor. Phys.,50, 2080 (1973).