1. GFR Patent 2218692, GFR Patent 2099311, French Patent 2024149.
2. Yu. I. Yermakov, V. A. Zakharov, G. D. Bukatov: Proc. Fifth International Congress on Catalysis, 1972, 399. North-Holland Publishing Co. 1973.
3. V. A. Zakharov, G. D. Bukatov, N. B. Chumayevski, Yu. I. Yermakov: Reaction Kinetics and Catalysis Letters,2, 247 (1974).
4. V. A. Zakharov, V. N. Druzhkov, Ye. G. Kushnareva: Kinet. Katal.,15, 446 (1974).
5. N. G. Maksimov, Ye. G. Kushnareva, V. A. Zakharov, V. F. Anufrienko, P. A. Shdan, Yu. I. Yermakov: Kinet. Katal.,15, 446 (1974).