1. G. T. Bodwin, D. R. Yennie, and M. A. Gregorio,Rev. Mod. Phys.,57, 723 (1985).
2. A. P. Martynenko and R. N. Faustov,Yad. Fiz.,45, 770 (1987).
3. H. Tsertos et al.,Phys. Lett.,162B, 273 (1985).
4. T. Cowan et al.,Phys. Rev. Lett.,56, 444 (1986).
5. B. A. Arbuzov, E. E. Boos, V. I. Savrin, and S. A. Shichanin ?Narrow resonances in systems of spinning charged particles and their possible physical manifestation?, Preprint 90-124 [in English], Institute of High Energy Physics, Protvino (1990).