1. D. H. E. Gross, H. Kalinowski and R. Beck, contribution 5.65, “Proceedings of the International Conference on Nuclear Physics”, Munich, August 27–September 1,1973
2. R. Bass, Phys. Lett. 47B (1973) 139, preprint Frankfurt 1974
3. M. Lefort, Y. Le Beyec, J. Peter, invited paper given at the Conference on Reactions between Complex Nuclei, Nashville, June 10–14, 1974 and: J. Galin, D.Guerreau, M. Lefort and X. Tarrago:“On the limitation to complete fusion during the collision between two complex nuclei”, Orsay preprint IPNO-RC-73-09 (1973), Institute de Physique Nucléaire, Université Paris-Sud, B.P. no. 1, 91406-Orsay, France
4. J. Wilczynski, Phys. Lett. 47B (1973) 484
5. D. Glass and U. Mosel, Phys. Lett. 49B (1974) 301