1. G. Yu. Grabosh et al., Yad. Fiz. 47, 1630 (1988) [Sov. J. Nucl. Phys. 47, 1032 (1988)]; J. Brunner et al., Z. Phys. C 45, 551 (1990).
2. Y. Oyama, KEK Preprint 2001-7 (2001);
3. T. Ishii, KEK Preprint 2002-28 (2002).
4. V. V. Ammosov et al., Sov. J. Part. Nucl. 23, 283 (1992).
5. V. M. Asaturyan, A. G. Khudaverdyan, and G. R. Gulkanyan, Nucl. Phys. A 496, 770 (1989).