1. Baluc, N., Karnthaler, H.P. and Mills, M.J., (1988) Instit. Phys. Conf. Ser. No. 93, Vol. 2, Ch. 13 (Instit. of Phys. Publishing Ltd.), 463.
2. Baluc, N., Mills, M.J., Bonneville, J. and Stoiber, J., (1991) Rev. Phys. Appl. in press.
3. Bontemps, C. and Veyssière, P., (1990) Phil. Mag. Lettres
61, 259.
4. Caillard, D., Clément, N., Couret, A., Lours, P. and Coujon, A., (1988) Phil. Mag. Lettres
58, 263.
5. Chou, C.T., Hazzledine, P.M., Hirsch, P.B. and Anstis, G.R., (1987) Phil. Mag.
56, 799.