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2. (a) P. J. Robinson and K. A. Holbrook, Unimolecular Reactions (Wiley, New York/London, 1972);
3. (b) W. Frost, Theory of Unimolecular Reactions (Academic, New York, 1973).
4. R. G. Gilbert and S. C. Smith, Theory of Unimolecular and Recombination Reactions (Blackwell Scientific, Oxford, 1990).
5. S. Schmatz and J. Troe, Chem. Phys. (to be published).