1. For a recent review seeH. J. Weber andH. Arenhövel:Isobar configurations in nuclei, to be published inPhys. Rep., C.
2. G. E. Brown andW. Weise:Phys. Rep.,22 C, 280 (1975).
3. Torino-Dubna-Frascati Collaboration: presented at the1976 European Symposium on Few Particle Problems in Nuclear Physics.
4. P. E. Argan, G. Audit, N. De Botton, J.-M. Laget, J. Martin, C. Schuhl andG. Tamas:Phys. Rev. Lett.,29, 1191 (1972).
5. V. D. Epaneshnikov, V. M. Kuznetsov andO. T. Stukov:Yad. Fiz.,19, 483 (1974) (English translation:Sov. Journ. Nucl. Phys.,19, 242 (1974)).