1. Assmuth, T.: 1992,Waste Manag. Res 10, 235.
2. Cartwright, K.: 1989, inGroundwater Contamination, National Research Council, National Academy Press, Washington, D.C., pp. 67–77.
3. Christensen, T. H., Bjerg, P. L., Heron, G., Williams G. W., Higgo, J. J. W., Bourg, A. C. M. and Altmann, R. S.: 1994a, Final Report to the CEC on Grant STEP CT 90069, Technical Univ. of Denmark, Lyngby, Denmark.
4. Christensen, T. H., Kjeldsen, P., Albrechtsen, H.A., Heron, G., Nielsen. P. H., Bjerg, P. L. and Holm, P. E.: 1994b,Crit. Reviews in Environmental Science and Technology 24, 119.
5. Crouzet, C.: 1994,DUESS Dissertation, Univ. of Limoges, France.