1. V. Kh. Sabitov, Medical Instruments (Meditsina, Moscow, 1985) [in Russian].
2. B. N. Arzamasov, A. G. Bratukhin, Yu. S. Eliseev, and T. A. Panaioti, Ion Chemical Thermal Processing of Alloys (Mosc. Gos. Tekh. Univ. Baumana, Moscow, 1999) [in Russian].
3. A. A. Il’in, S. V. Skvortsova, E. A. Lukina, et al., Metally 2, 38 (2005).
4. Yu. Kh. Akhmadeev, Yu. F. Ivanov, N. N. Koval’, et al., J. Surf. Invest. 2, 166 (2008).
5. N. V. Gavrilov and A. S. Mamaev, Tech. Phys. Lett. 35, 713 (2009).