1. For reviews on GUTs seeJ. Ellis: CERN preprint TH-3802 (1984);
2. D. V. Nanopoulos: Ecole d’Eté de Physique des Particules, Gif-sur-Yvette (INEP3, Paris, 1980), p. 1;P. Langacker:Phys. Rep. C,72, 185 (1981).
3. For a review, seeE. Farhi andL. Susskind:Phys. Rep. C,74, 277 (1981).
4. Y. A. Gol’fand andE. P. Likhtman:Pis’ma Ž. Ėksp. Teor. Fiz.,13, 323 (1971);D. Volkov andV. P. Akulov:Phys. Lett. B,46, 109 (1973);J. Wess andB. Zumino:Nucl. Phys. B,70, 39 (1974). For reviews seeP. Fayet andS. Ferrara:Phys. Rep. C,32, 249 (1977);J. Wess andJ. Bagger:Supersymmetry and Supergravity (Princeton University Press, Princeton, N. J., 1983).
5. M. Veltman:Acta Phys. Pol. B,12, 437 (1981);T. Inami, H. Nishino andS. Watamura:Phys. Lett. B,117, 197 (1983);N. G. Deshpande, R. J. Johnson andE. Ma:Phys. Lett. B 130, 61 (1981).