1. For review, see, J. Schwarz, Phys. Rep. 89, 223 (1982).
2. P. Ramond, Phys. Rev. D3, 2415 (1971) A. Neveu and J. Schwarz Nucl. Phys. B31, 86 (1971); Phys. Rev. D4, 1109 (1971).
3. J. Wess and B. Zumino, Nucl. Phys. B70, 39 (1974).
4. F. Gliozzi, J. Scherk and D. Olive, Phys. Lett. 65B, 282 (1976); Nucl. Phys. B122, 253 (1977).
5. M. Green and J. Schwarz, CALT-68–956 (Oct. 1982).