1. R. Bacaud, F. Bussier, F. Figueras, J.-P. Mathieu: Intern. Symp. Scientific Bases for the Preparation of Heterogeneous Catalytss, Belgium,B7, 1975.
2. Proc. All-Union Seminar;N.A. Pakhomov,1978
3. H. Berndt, H. Mehner, S. Volter, W. Meisel: Z. Anorg. Allg. Chem.,429, 47 (1977).
4. Proc. All-Union Seminar;B.N. Kuznetsov,1978
5. V.N. Seleznev, Yu.V. Fomichev, M.E. Levinter: Neftekhimiya,14, 205 (1974).