1. Barrie, L. A. and Sirois, A.: 1986, Water, Air, and Soil Pollut. 30, 303.
2. Briassoulis, H.: 1987, Environ. Management 11, 271.
3. Carignan, R. and Tessier, A.: 1988, Geochim. et Cosmochim. Acta. 52.
4. Cosby, B. J.: 1987, ?Modelling Reversibility of Acidification with Mathematical Models?, in Barth, H. (ed.), Reversibility of Acidification, Elsevier Applied Science, New York, pp. 114?125.
5. Dickson, W.: 1986, ?Acidification Effects in the Aquatic Environment?, in Schneider, T. (ed.), Acidification and its Policy Implications, Elsevier Science Publishers B. V., Amsterdam, pp. 19?28.