1. Auffret, S., et al.: Phys. Rev. Lett.55, 1362 (1985)
2. Bosted, P. E., et al.: In. Proceedings of the Fourth Workshop on Perspectives in Nuclear Physics at Intermediate Energies, Trieste (Boffi, S., Ciofi degli Atti, C., Giannini, M., eds.), p. 155. Singapore: World Scientific 1990; Amold, R. G., et al.: Phys. Rev.C42 (1990)
3. Mathiot, J.-F.: Phys. Rep.173, 63 (1989)
4. Frois, B., Papanicolas, C. N.: Ann. Rev. Nucl. Part. Sci.37, 133 (1987)
5. Arenhövel, H.: In: Proceedings of the International School of Intermediate-Energy Physics, Verona (Bergère, R., Costa, S., Schaerf, C., eds.), p. 55, Singapore: World Scientific 1986