1. F. L. Shapiro, Usp. Fiz. Nauk 65, 133 (1958).
2. H. Ackermann, D. Dubbers, and H.-J. Stoeckmann, Adv. Nucl. Quadrupole Reson. 3, 1 (1978).
3. H. Ackermann, P. Heitjans, and H.-J. Stoeckmann, Top. Curr. Phys. 31, 291 (1983).
4. Yu. G. Abov, A. D. Gul'ko, F. S. Dzheparov, and S. S. Trostin, Some Problems in Modern Nuclear Physics (Nauka, Moscow, 1989), p. 193.
5. Yu. G. Abov, M. I. Bulgakov, S. P. Borovlev, et al., Zh. Éksp. Teor. Fiz. 99, 962 (1991) [Sov. Phys. JETP 72, 534 (1991)].