1. Yu. A. Kolobov and R. Z. Valiev, Grain-Boundary Diffusion and Properties of Nanostructural Materials (Nauka, Novosibirsk, 2001) [in Russian].
2. G. P. Grabovetskaya, I. P. Mishin, I. V. Ratochka, S. G. Psakhie, and Yu. R. Kolobov, “Grain-Boundary Diffusion of Nickel in Submicrocrystalline Molybdenum Processed by Severe Plastic Deformation,” Tech. Phys. Lett. 34, 136–138 (2008).
3. G. P. Grabovetskaya, I. V. Ratochka, Yu. R. Kolobov, and M. N. Puchkareva, “A Comparative Study of Grain-Boundary Diffusion of Copper in Ultrafine-Grained and Coarse-Grained Nickel,” Phys. Met. Metallogr. 83, 310–313 (1997).
4. I. Kaur and W. Gust, Fundamentals of Grain and Interphase Diffusion, 2nd ed. (Ziegler, Stuttgart, 1989).
5. V. B. Vykhodets, E. V. Vykhodets, B. A. Gizhevskii, et al., “Grain Boundary Self-Diffusion of Tracer 18O Atoms in Nanocrystalline Oxide LaMnO3 + δ),” JETP Lett. 87, 115–119 (2008).