1. Modern Tribology, Results and Prospects, Ed. by K. V. Frolov (LKI, Moscow, 2008) [in Russian].
2. A. I. Grigorov and A. P. Semenov, Processing of Gas Bearings Using Ion Sputtering (Nauka, Moscow, 1978) [in Russian].
3. M. V. Nozhenkov, A. S. Avilov, A. P. Semenov, and S. A. Semiletov, Poverkhnost, No. 9, 148 (1987).
4. T. A. Lobova and E. A. Marchenko, Trenie Iznos 29, 391 (2008).
5. V. L. Kalikhman and Ya. S. Umanskii, Sov. Phys. Usp. 15, 728 (1972).