1. Dynamics of Gas-Surface Interactions, Eds. C.T. Rettner and M.N.R. Ashfold, Advances in Gas-phase Photochemistry and Kinetics, Volume III (Royal Society of Chemistry, Cambridge, UK, 1991).
2. A.W. Kleyn, J. Los and E.A. Gislason, Phys. Rep. 90 (1982) 1.
3. J.W. Gadzuk and J.K. Norskov, J. Chem. Phys 81 (1984) 2828.
4. J.W. Gadzuk, Comm. At. Mol. Phys 16 (1985) 219.
5. J.W. Gadzuk and S. Holloway, Phys. Scr. 32 (1985) 413.