1. Yu. N. Shekter and S. É. Krein, Surfactants from Petroleum Raw Material [in Russian], Khimiya, Moscow (1971), pp. 439?441.
2. I. G. Fuks, Lubricating Greases [in Russian], Khimiya, Moscow (1972), p. 38.
3. V. V. Samgina, I. G. Fuks, and M. B. Bakaleinikov, Khim. Tekhnol. Topl. Masel, No. 6, 62 (1973).
4. I. G. Fuks and V. V. Vainshtok, Sealing and Lubricating Materials [in Russian], TsNIITÉneftekhim, Moscow (1968), pp. 37?40.
5. D. S. Velikovskii et al., Lubricating Greases [in Russian], Khimiya, Moscow (1966), pp. 71, 85.