1. For a review see R.E. Marshak, Riazuddin and C.P. Ryan, The Theory of Weak Interactions in Particle Physics,(Wiley-Interscience, 1968).
2. A. Bohm and R.B. Teese, Jour.Math.Phys. 18,1434 (1977)
3. For a review see A. Sirlin, Rev. of Mod. Phys. 50, 573 (1978). A. Garcia Phys. Lett. 73B, 299 (1978).
4. A. Bohm, R.B. Teese, A.García and J.S. Nilsson, Phys. Rev. D15, 689, (1977).