1. Quickenden, T.I., Litjens, R.A.J., Freeman, C.G., and Trotman, S.M., Chem. Phys. Lett., 1985, vol. 114, no. 2, p. 164.
2. Litjens, R.A.J., PhD Thesis, Perth: Univ. of Western Australia, 1986.
3. Litjens, R.A.J. and Quickenden, T.I., J. Phys. Colloq., 1987, p. C1/59.
4. Matich, A.J., PhD Thesis, Perth: Univ. of Western Australia, 1992.
5. Lennon, D., Quickenden, T.I., and Freeman, C.G., Chem. Phys. Lett., 1993, vol. 201, nos. 1–4, p. 120.