1. Green, A.M., Niskanen, J.A., Sainio, M.E.: J. Phys. G (Nuclear Physics)4, 1055 (1978); Machleidt, R.: Advances in nuclear physics. Vol. 19, Negele, J.W., Vogt, E. (eds.), pp. 189?376, New York: Plenum Press 1989
2. Arndt, R.A., Hyslop III, J.S., Roper, L.D.: Phys. Rev. D35, 128 (1987); Bystricky, J., Lechanoine-Leluc, C., Lehar, F.: J. Phys.48, 199 (1987); Bugg, R.V.: Phys. Rev. C41, 2708 (1990); and Private communications with Arndt, Lechanoine-Leluc, and Bugg
3. Fasano, C.G., Lee, T.-S.H.: Nucl. Phys. A513, 442 (1990)
4. Betz, M., Lee, T.-S.H.: Phys. Rev. C23, 375 (1981); Lee, T.-S.H: Phys. Rev. Lett.50, 157 (1983); Lee, T.-S.H.: Phys. Rev. C29, 195 (1984)
5. Wada, Masanobu: Prog. Theor. Phys.41, 105 (1969); Oset, E., Toki, H., Weise, W.: Phys. Rep.83, 281 (1982)