1. G. I. Salomatin, V. S. Sobolevskii, V. V. Grigor'ev, L. I. Lafer, and V. I. Yakerson, Izv. Akad. Nauk SSSR, Ser. Khim., 2204 (1981).
2. V. É. Vasserberg, I. V. Kalechits, A. M. Taber, V. I. Yakerson, S. S. Zhukovskii, V. I. Sorokin, I. M. Barats, and L. I. Lafer, Inventor's Certificate No. 528945 (1975);
3. Byull. Izobr., No. 5 (1976).
4. L. I. Lafer, V. I. Yakerson, and B. A. Nabiev, Izv. Akad. Nauk SSSR, Ser. Khim., 1942 (1975).
5. N. D. Parkins, Proceedings of the III International Congress on Catalysis, Vol. 2, Amsterdam (1965), p. 914.