1. Kavaloski, C.D., Lilley, J.S., Richard, Patrick, Stein, Nelson: Phys. Rev. Lett.16, 807 (1966)
2. Temmer, G.M., Lenz, G.H., Garvey, G.T.: in Proc. Int. Conf. Nucl. Phys., Gatlinburg, Tenn. 1966 (ed. R.L. Becker and A. Zucker) p. 255. New York: Academic Press 1967
3. Bredin, D.J., Hansen, O., Lenz, G., Temmer, G.: Phys. Lett.21, 677 (1966)
4. Booth, E.C., Madsen, B.S.: Nucl. Phys. A206, 293 (1973)
5. Crawley, G.M., Miller, P.S., Galonsky, A., Amos, T., Doering, R.: Phys. Rev. C6, 1890 (1972)