1. Ya. I. Isakov, Kh. M. Minachev, and N. Ya. Usachev, Izv. Akad. Nauk SSSR, Ser. Khim., 1175 (1972).
2. Ya. I. Isakov and Kh. M. Minachev, Usp. Khim.,51, 2069 (1982).
3. H. Bremer, K.-H. Eager, and F. Vogt, Z. Chem.,14, No. 5, 199 (1974).
4. S. P. Zhdanov and E. N. Egorova, The Chemistry of Zeolites [in Russian], Nauka, Moscow (1968).
5. B. N. Dolgov, Catalysis in Organic Chemistry [in Russian], Gostoptekhizdat, Moscow (1959), p. 619.