1. Abrahamsen, G., Stuanes, A.O., Tveite, B., 1994. Long-term experiments with acid rain in Norwegian forest ecosystems. In: Ecological Studies, vol. 104. Springer-Verlag, New York.
2. Agriculture Canada Expert Committee on Soil Survey, 1987. The Canadian System of Soil Classification, 2nd ed. Canadian Government Publishing Centre, Ottawa, Canada.
3. Anon., 1985. SAS/STAT Guide for Personal Computers, Version 6 Edition. SAS Institute Inc., Cary, NC, 178 pp.
4. Does atmospheric deposition of nitrogen threaten Swedish forests?;Binkley;For. Ecol. Manage.,1997
5. Blingsmo, K., 1984. Diametertilvekstfunksjoner for bjørk-, furu-, og granbestand (Diameter increment functions for stands of birch, Scots pine and Norway spruce). Rapport fra Norsk Institutt for Skogforskning, July 1984, pp. 1–22 (in Norwegian with English summary).