1. M. Konczykowski et al., Phys. Rev. B 44, 7167 (1991).
2. V. Hardy et al., Nucl. Instrum. Methods Phys. Res. B 54, 472 (1991).
3. L. Civale et al., Phys. Rev. Lett. 67, 648 (1991).
4. I. M. Lifshits, M. I. Kaganov, and L. V. Tanatarov, J. Nucl. Energy, Part A 12, 69 (1960).
5. R. L. Fleischer, P. B. Price, and R. M. Walker, Nuclear Tracks in Solids: Principles and Applications (Univ. California Press, Berkeley, Calif., 1979; Energoizdat, Moscow, 1981).