1. T. Hamada and I. Johnston, Nucl. Phys. 34, 382 (1962)
2. R.V. Reid, Ann. Phys. (N.Y.) 50, 411 (1968)
3. R. Machleidt, Adv. in Nucl. Phys. 19, 189 (1989)
4. R. Vinh Mau, in Mesons in Nuclei Vol. I ( North-Holland, Amsterdam, 1979 ) p. 151
5. H. Muther, Prog. in Part. and Nucl. Phys. 17, 97 (1986)