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2. F. P. Bowden and D. Tabor, Friction and Lubrication of Solids, Oxford Univ. Press (1954, 1964).
3. D. N. Garkunov, I. V. Kragel'skii, and A. A. Polyakov, Selective Transfer in Friction Units [in Russian], Moscow (1969).
4. M. O. W. Richardson, Wear,17, 89 (1971).
5. I. V. Kragel'skii, Mekhan. Polim., No. 5, 797 (1972).