1. B. Bleaney, Proc. Phys. Soc. Lond.A 64 (1951) 315.
2. D. Vandeplassche, L. Vanneste, H. Pattyn, J. Geenen, C. Nuytten and E. van Walle, Nucl. Instr. and Meth.186 (1981) 211.
3. V. R. Green, C. J. Ashworth, J. Rikovska, T. L. Shaw, N. J. Stonc, P. M. Walker, C. Leyland and I. S. Grant, Nucl. Instr. and Meth.B 26 (1987) 482.
4. I. C. Girit, G. D. Alton, C. R. Bingham, H. K. Carter, M. L. Simpson, J. H. Hamilton, B. D. Kern, K. S. Krane and E. F. Zganjar, in Nuclci far from Stability, I. S. Towner (ed.) American Institute of Physics Conference Proceedings164 (1988 New York) 849 and contribution to this workshop.
5. P. Cizek, M. Finger, Z. Janout, J. John, P. Pokorny, V. N. Pavlov, B. Sedlak, P. Simecek, E. Simeckova, V. M. Tsupko-Sitnikov, J. Zafar, contribution to this workshop.