1. M. Morita, Few-Body System, Suppl. 5 (1992) 165.
2. M. Morita, M. Nishimura and H. Ohtsubo, Phys. Lett. 73B (1978) 17.
3. D.S. Armstrong et al., in:Proc. Int. Symp. on Weak and Electromagnetic Interactions in Nuclei, Montreal 1989, ed. P. Depommier (Editions Fronti�res, Gif-sur-Yvette, 1989) p. 637.
4. A.J. Larabee et al., in:Proc. Int. Symp. on Weak and Electromagnetic Interactions in Nuclei, Montreal 1989, ed. P. Depommier (Editions Fronti�res, Gif-sur-Yvette, 1989) p. 641.
5. D.H. Wright et al., in:Proc. Int. Symp. on Weak and Electromagnetic Interactions in Nuclei, Montreal 1989, ed. P. Depommier (Editions Fronti�res, Gif-sur-Yvette, 1989) p. 645.