1. I. V. Poplavsky, Sov. J. Nucl. Phys. 45 (1987) 240.
2. I. V. Poplavsky, EChAYa (Particles and Nuclei) 27 (1996) 1099.
3. I. V. Poplavsky, Izv. Ac. Nauk Ser. Fiz. 61 (1997) 769.
4. I. V. Poplavsky, Izv. Ac. Nauk Ser. Fiz. 64 (2000) 422.