1. For a complete discussion of the Grassmann algebra seeF. A. Berezin:The Method of Second Quantization (New York, N. Y., and London, 1966).
2. For a related non-Lagrangian attempt seeJ. L. Martin:Proc. Roy. Soc., A251, 536 (1959).
3. P. A. M. Dirac:The Principles of Quantum Mechanics, Third Edition (Oxford, 1947), p. 84.
4. There is now an excellent review of graded Lie algebras in mathematics and physics byL. Corwin, Y. Ne’eman andS. Sternberg:Rev. Mod. Phys.,47, 573 (1975).
5. For a good introduction to the algebraic structures seeW. H. Greub:Linear Algebra (Berlin, 1967).