1. Battarbee, R.W., Flower, R., Stevenson, T. and Harriman, R.: 1988, Nature 332, 530
2. Bergman, H.L., Mattice, J.S. and Brown, D.J.A.: 1988, Can. J. Fish. Aq. Sci. 45, 1551
3. Brakke, D.F., Eilers, J.M. and Landers, D.H.: 1987, ‘Hydrologic and chemical aharacteristics of darkwater, clearwater and acidic lakes in the United States’ in Acidification and water pathways, Norwegian National Committee on Hydrology, Oslo. p. 281–290
4. Brakke, D.F., Landers, D.H. and Eilers, J.M.: 1988, Environ. Sci. Technol. 22, 155
5. Brakke, D.F., Landers, D.H. and Eilers, J.M.: 1988, Environ. Sci. Technol. 22, 155