1. Abrahamsen, G., 1984: Effects of acidic deposition on forest soil and vegetation. Phil. Trans, R. Soc. Lond. B 305, 369–382.
2. Andersson, F.; Olsson, B., 1986 (eds.): Lake Gärdsjön. An acid forest lake and its catchment. Publ. House of the Swedish Research Concils. Stockholm, 336 p.
3. Andersson, F.; Aronsson, A.; Popovic, B.; Tamm, C.O., 1988: Swedish forests in a changing environment, effects on soils, tree nutrition and growth. Symposium “Forest Health and Productivity”, Stora Skog 1988, Falun, Sweden·
4. Aronsson, A., 1991: Effects of nitrogen addition on growth, nutrient contents and induced imbalances in a young Norway spruce stand. Poster, 1st European Symposium on Terrestrial Ecosystems: Forests and Woodlands. Florence, Italy, 20–24th May 1991.
5. Becker, M.; Bräker, O.-U.; Kenk, G.; Schneider, O.; Schweingruber, F.-H., 1990: Kronenzustand und Wachstum von Waldbäumen im Dreiländereck Deutschland-Frankreich-Schweiz in den letzten Jahrzehnten. AFZ 11