1. S. Coleman and J. Mandula, Phys. Rev., 159 (1967), 1251.
2. J. Wess and B. Zumino, Phys. Lett., 49B:Nucl. Phys. (1974).
3. R. Haag, J. T. Lopuzanski and M. F. Sohnius, Nuclear Phys., B:88 (1975).
4. M. F. Sohnius, Physics Reports (Review Section of Physics Latters), vol. 128, North-Holland, Amsterdam., 1985.
5. L. Brink, J.H. Schwarz, and J. Scherk, Nuclear Phys., 121 (1977), 77–92.