1. H. Enatsu, A. Takenaka andM. Okazaki:Nuovo Cimento A,43, 575 (1978);A. Takenaka:Nuovo Cimento A,50, 155 (1979).
2. A. Takenaka:Nuovo Cimento A,94, 367 (1986).
3. A. Takenaka:Nuovo Cimento A,101, 631 (1989).
4. See,e.g.,G. Kane:Modern Elementary Particle Physics (Addison-Wesley, New York, N. Y., 1987);I. J. A. Aitchison andA. J. G. Hey:Gauge Theories in Particle Physics (Adam Hilger, Bristol, 1982).
5. Particle Data Group:Phys. Lett. B,170, 1 (1986).