1. G. Langouche, J.C. Soares and J.P. Stoquert, eds.,Proc. Symp. F on Nucl. Meth. in Semicond. Physics of the 1991 E-MRS Spring Conf., Nucl. Instr. Meth. B62 (1992) 1.
2. H. Rauch, Z. Phys. 197 (1966) 389.
3. H. Ackermann, D. Dubbers, J. Mertens, A. Winnacker and P. von Blanckenhagen, Phys. Lett. 29B (1969) 485.
4. K. Sugimoto, A. Mizobuchi, T. Minamisono, in:Hyperfine Interactions in Excited Nuclei, Vol. 1, eds. G. Goldring and P. Kalish (Gordon and Breach, New York, 1971) p. 325.
5. A. Winnacker, H. Ackermann, D. Dubbers, J. Mertens and P. von Blanckenhagen, Z. Phys. 244 (1971) 289.