1. Abrahamsen, G. In D. Drabløs & A. Tollan, (Ed.), 1980. Ecological impact of acid precipitation. - Proc. Int. Conf. Sandefjord, Norway: 58–63.
2. Ahl, T. (Ed.), 1972. Hydrochemical analyses. A catalogue of procedures used within the IHD in the Nordic countries. National committees for the international hydrological decade in Denmark, Finland, Iceland, Norway and Sweden. Nordic IHD report No. 3. 69 pp. Oslo.
3. Ahl, T., 1985. Water quality monitoring in Sweden. Wat. Qual. Bull. 10: 82–90.
4. Lecture Notes in Earth Sciences;T. Andersson,1991
5. Boer, M. M., E. A. Koster & H. Lundberg, 1990. Greenhouse impact in Fennoscandia — preliminary findings of a European workshop on the effects of climatic changes. AMBIO 19: 2–10.