1. Adams, N.G., and Smith, D. 1983 in Reactions of Small Transient Species Ed. A. Fontijn and M.A.A. Clyne (London, Academic), p.311.
2. Adams, N.G. and Smith, D. 1987 in Astrochemistry Ed. M.S. Vardya and S.P. Tarafdar, (Dordrecht, Holland, Reidel), p.1.
3. Adams, N.G., and Smith, D. 1988Chem. Phys. Letts., in press.
4. Adams, N.G., Smith, D., and Alge, E. 1984 J. Chem. Phys., 81, 1778.
5. Adams, N.G., Smith, D., and Clary, D.C., 1985, Ap. J. (Letters), 296, L31.