1. See, for instance, K. J. Laidler: Reaction Kinetics, Vols. 1 + 2 (Pergamon Press, New York, 1963).
2. R. Gomer: Chemisorption (to be published in the series Solid State Physics, Academic Press).
3. D. O. Hayward, B. M. W. Trapnell: Chemisorption (Butterworths, London, 1964).
4. G. E. Moore, F. C. Unterwald: J. Chem. Phys. 40, 2639 (1964); and references therein.
5. E. A. Guggenheim: Phil. Mag. 2, 538 (1926)