1. J. H. Sinfelt, J. L. Carter and D. J. C. Yates, J. Catal., 24, 283 (1972).
2. J. H. Sinfelt, J. Catal., 29, 308 (1973).
3. R. L. Garten, J. Catal., in press.
4. For example see J. R. Anderson, “Structure of Metallic Catalysts”, Academic Press, New York, 1975.
5. P. C. Aben, J. Catal., 10, 224 (1968).