1. T. Yu, Y. Wu: J. Catal. (China),10, 256 (1989).
2. F.T. Ma, Y.H. Chen, H. Lou: React. Kinet. Catal. Lett.,31, 47 (1986).
3. S.D. Ross: Inorganic Infrared and Raman Spectra, p. 108. McGraw-Hill, London, 1972.
4. G. Blasse, A.F. Corsmit: J. Solid State Chem.,6, 513 (1973).
5. S.B. Du, F.T. Ma, J. Wang: WuLi HuaXue XueBao,7, 474 (1991).