1. Collection: Lube Oil Additives [in Russian], Vol. 1, Khimiya, Moscow (1966), pp. 22, 95; Vol. 2, Khimiya, Moscow (1968).
2. U. S. Pat 3,150,089 (1964); 3,242,080 (1966).
3. Yu. N. Shekhter, Protection of Metals from Corrosion [in Russian], Khimiya, Moscow (1964), p. 31.
4. U. S. Pat. 3,149,074 (1964).
5. Yu. N. Shekhter, S. É. Krein, and V. P. Kalashnikov, Oil-Soluble Sultonates [in Russian], Gostoptekhizdat, Moscow (1963).