1. A. Yu. Romanov and I. V. Dmitriev, Pis’ma Zh. Tekh. Fiz. 30(18), 65 (2004) [Tech. Phys. Lett. 30, 784 (2004)].
2. A. Yu. Romanov and I. V. Dmitriev, Poverkhnost, No. 8, 32 (2005).
3. V. D. Gelever and A. Yu. Romanov, Pis’ma Zh. Tekh. Fiz. 31(5), 52 (2005) [Tech. Phys. Lett. 31, 202 (2005)].
4. V. D. Gelever and A. Yu. Romanov, Proc. SPIE 5943, 313 (2005).
5. C. A. McDonald, J. X-Ray Sci. Technol. 6, 32 (1996).