1. Isospin in Nuclear Physics ed. by D.H. Wilkinson, North-Holland Publ. Co. Amsterdam, 1969.
2. E.M. Henley and G.A. Miller in Mesons in Nuclei I ed. by M. Rho and D.H. Wilkinson, North-Holland Publ. Co., Amsterdam 1979, p. 407
3. W. Benenson and E. Kashy, Rev. Mod. Phys. 51, 527 (1979).
4. R.D. Lawson, Phys. Rev. C19, 2359 (1979).
5. J.A. Nolen and J.P. Schiffer, Ann. Rev. Nucl. Sci. 19, 471 (1969).