1. See, for example, L. Friedman and B. G. Reuben, Adv. Chem. Phys. 19, 33 (1970).
2. K. R. Jennings, in Mass Spectrometry: Techniques and Applications (G. A. W. Milne, ed.), Wiley, New York, 1971, p. 419.
3. J. L. Holmes and F. Benoit, in MTP Review of Science, Physical Chemistry, Series One, Vol. 5 (A. Maccoll, ed.), University Park Press, Baltimore, 1972, Chapter 8.
4. R. G. Cooks, J. H. Beynon, R. M. Caprioli, and G. R. Lester, Metastable Ions, Elsevier, Amsterdam, 1973.
5. J. A. Hippie and E. U. Condon, Phys. Rev. 68, 54 (1945).