1. Th. Wolkenstein, Probi. Kinet. Katal., 8, 79 (1955).
2. V. V. Voevodskii, Th. Wolkenstein, and N. N. Semenov, in: Problems of Chemical Kinetics, Catalysis, and Reactivity [in Russian], Izd-vo Akad. Nauk SSSR, Moscow (1955), p. 423.
3. N. Thon and H. A. Taylor, J. Am. Chem. Soc., 75,2447 (1953).
4. Th. Wolkenstein,Zh. Fiz. Khim., 24, 1068 (1950).
5. M. Boudart, J. Am. Chem. Soc., 74,1531 (1952).