1. M. M. Akhmetov and N. N. Karpinskii, Tr. Bash. Nauchno-Issled. Inst. Pererab. Nefti, No. 23, 33?44 (1984).
2. T. V. Tomanova and M. M. Akhmetov, in: Summaries of Papers from 16th Republic Scientific-Technical Conference [in Russian], Ufa (1990), p. 61.
3. M. M. Akhmetov, Yu. N. Él'tekov, and S. P. Andryushenko, Tr. Bash. Nauehno-Issled. Inst. Pererab. Nefti, No. 16, 135?139 (1977).
4. M. M. Akhmetov, N. N. Karpinskaya, and N. N. Shipkov, Tr. Bash. Nauehno-Issled. Inst. Pererab. Nefti, No. 21, 17?23 (1982).
5. K. Pavlovski, Ya. Brublevska, V. V. Mochalov, et al., Tsvetn. Met., No. 3, 62?64 (1990).