References
- Bray, J.R. and Curtis, J.J., 1957: An ordination of the upland forest communities of southern Wisconsin. Ecol. Monogr. 27: 325–349.
- Chapin, F. S., III., 1980: The mineral nutrition of wild plants. Ann. Rev. Ecol. Syst. 11: 233–260.
- Grime, J. P., 1977: Evidence for the existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am. Nat. 111: 1169–1194.
- Grime, J. P. 1979: Plant strategies and vegetation processes. John Wiley & sons. Chichester. 222 p.
- Hesse, P. R., 1971: A textbook of soil chemical analyses. John Murray Ltd. London. 520 p.
- Jonasson, S., 1981: Plant communities and species distribution of low Alpine Betula nana heaths in northernmost Sweden. Vegetatio 44: 51–64.
- Jonasson, S. 1982: Organic matter and phytomass on three north Swedish tundra sites, and some connections with adjacent tundra areas. Holarc Ecol. 5: 367–375.
- Jonasson, S. and Chapin, F. S., III., 1985: Significance of sequential leaf development for nutrient balance of the cotton sedge, Eriophorum vaginatum L. Oecologia 67: 511–518.
- Jonasson, S. and Sköld, S. E., 1983: Influences of frost-heaving on vegetation and nutrient regime of polygon-patterned ground. Vegetatio 53: 97–112.
- Kitson, R. E. and Mellon, M. G., 1944: Colorimetric determination of phosphorus as molybdivanadophosphoric acid. Industrial and engineering Chem., Analyt. Ed. 16: 379–383.
- Levy, E. G. and Madden, E. A., 1933: The point method of pasture analysis. New Zealand J. Agric. 46: 267–279.
- Mårtensson, O., 1956: Bryophytes of the Torneträsk area, northern Swedish Lappland. Kung. Sv. Vetensk. Akad. Avhandl. Naturskydd 15: 1–63.
- Nilsson, I., 1975: Bestämning av utbytbara vätejoner genom extraktion med neutralt ammoniumacetat. Medd. Ekol. Bot. Univ. Lund 3(2): 11–13.
- Raup, H. M., 1969: The relation of the vascular flora to some factors of site in the Mesters Vig district northeast Greenland. Medd. Grönland 176(5). 80 p.
- Raup, H. M. 1971: The vegetational relations of weathering, frost action and patterned ground processes in the Mesters Vig district northeast Greenland. Medd. Grönland 194(1). 92 p.
- Sandberg, G., 1938: Redogörelser för undersökningar utförda med understöd av sällskapets stipendier. Ymer 58: 333–337.
- Sandberg, G., 1940: Gasteromycetstudier. Acta Phytogeogr. Suec. 13: 73–95.
- Small, E., 1972: Ecological significance of four critical elements in plants of raised Sphagnum peat bogs. Ecology 53: 498–503.
- Waring, S. A. and Bremner, J. M., 1964: Ammonium production in soils under waterlogged conditions as an index of nitrogen availability. Nature 201: 951–952.