1. Some of the progress in the field may be followed in these three conference volumes: Faraday Discussions of the Chemical Society, 73 (1982);’ Structure and Dynamics of Weakly Bound Molecular Complexes,’ A. Weber (ed.), NATO ASI Series, series C, vol. 212, Reidel, Dordrecht (1987);’ Dynamics of Polyatomic Van der Waals Complexes,’ N. Halberstadt and K.C. Janda (eds.), NATO ASI Series, series B, vol. 227, Plenum Press, New York (1990).
2. Coulon, R., Galatry, L., Oksengorn, B., Robin, S., and Vodar, B. (1954), J. Phys. Rad. 15, 58; Vu, H. and Vodar, B. (1959), Compt. Rend. 248, 2082; Vodar, B. (1960), Proc. Roy. Soc. (London) A255, 44-55; Turrell, G.C., Vu, H., and Vodar, B. (1960), J. Chem. Phys. 33, 315-316.
3. Smith, D.F. (1958), J. Chem. Phys. 28, 1040–1056; Smith, D.F. (1959), J. Mol. Spectrosc. 3, 473-485.
4. Herget, W.F., Gailar, N.M., Lovell, R.J., and Nielsen, A.H. (1960), J. Opt. Soc. Amer. 50, 1264–1267.
5. Bohac, E.J., Marshall, M.D., and Miller, R.E. (1992), J. Chem. Phys. 96, 6681–6695.