1. A. K. Maskaev, N. K. Man'kovskaya, and E. N. Simurova, in: Lubricating Greases [in Russian], Naukova Dumka, Kiev (1971), p. 33.
2. L. P. Ishchuk, V. V. Sinitsyn, Yu. L. Ishchuk, N. K. Man'kovskaya, and A. K. Maskaev, Khim. Tekhnol. Topl. Masel, No. 7, 26?28 (1972).
3. Collected Works;Yu. L. Ishchuk,1973
4. Petroleum Products ? Test Methods [in Russian], Vols. 1 and 2, Standartizdat, Moscow (1967).
5. V. V. Sinitsyn, Selection and Application of Lubricating Greases [in Russian], Khimiya, Moscow (1974).