1. For a review see, for example, Guerreau, D.: Nuclear matter and heavy-ion collisions. Soyeur, M., Flocard, H., Tamain, B., Porneuf, M. (eds.): New York: Plenum Press 1989
2. Wada, R., Fabris, D., Hagel, K., Nebbia, G., Lou, Y., Gonin, M., Natowitz, J.B., Billerey, R., Cheynis, B., Demeyer, A., Drain, D., Guinet, D., Pastor, C., Vagneron, L., Zaid, K., Alarja, J., Giorni, A., Heuer, D., Morand, C., Viano, B., Mazur, C., Ng�, C., Leray, S., Lucas, R., Ribrag, M., Tomasi, E.: Phys. Rev. C39, 497 (1989)
3. Holub, E., Hilscher, D., Ingold, G., Jahnke, U., Orf, H., Rossner, H., Zank, W.P., Schro�der, W.U., Gemmeke, H., Keller, K., Lassen, L., L�cking, W.: Phys. Rev. C33, 143 (1986)
4. Steckmeyer, J.C., Bizard, G., Brou, R., Eudes, P., Laville, J.L., Natowitz, J.B., Patry, J.P., Tamain, B., Thiphagne, A., Doubre, H., P�ghaire, A., Peter, J., Rosato, E., Adloff, J.C., Kamili, A., Rudolf, G., Scheibling, F., Guilbault, F., Lebrun, C., Hanappe, F.: Nucl. Phys. A500, 372 (1989)
5. Bloch, C., Benenson, W., Galonsky, A.I., Kashy, E., Heltsley, J., Heilbronn, L., Lowe, M., Radtke, R.J., Remington, B., Kasagi, J., Morrissey, D.J.: Phys. Rev. C37, 2469 (1988)