1. R. Ruh, H. S. Madiyasni, and P. G. Valentine, ?Phase relations in the ZrO2-Y2O3 system at low Y2O3 contents,? J. Amer. Ceram. Soc.,67, No. 9, 190?192 (1984).
2. A. M. Gusev, Physical Chemistry of Non-stoichiometric Refractory Compounds [in Russian], Nauka, Moscow (1991).
3. S. Z. Raginskii, Electronic Phenomena in Heterogenous Catalysis [in Russian], Nauka, Moscow (1975).
4. G. I. Savvakin, ?Structure formation in powders with a given nonequilibrium electronic subsystem state,? Zhur. Vsesoyuz. Khim. o-va Im. D. I. Mendeleeva,36, No. 2, 141?146 (1991).
5. M. I. Rabinovich, A. L. Fabrikant, and L. Sh. Tsimring, ?Finite spacial disorder,? Usp. Fiz. Nauk.,162, No. 8, 1?42 (1992).