References
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- Lundgren, A., 1977: Nitrogen fixation induced by phosphorus fertilization. — Ecol. Bull. 26 (in press).
- Persson, G., Holmgren, S., Jansson, M., Lundgren, A., Nyman, B., Solander, D. & Ånell, C., 1977: Phosphorus and nitrogen and the regulation of lake ecosystems. Experimental approaches in subarctic Sweden. — In: Proc. from Circumpolar Conference on Northern Ecology. Sept. 1975. Ottawa, Canada.
- Schindler, D. W., Kling, H. R., Schmidt, R. V., Prokopowich, J., Frost, V. E., Reid, R. A. & Capel, M., 1973: Eutrophication of lake 227 by addition of phosphate and nitrate: the second, third and fourth years of enrichment 1970, 1971 and 1972. — J. Fish. Res. Bd. Canada 30: 1415–1440.
- Tirén, T., 1977: Denitrification in sedimentwater systems of various types of lakes. — In: Proc. from Interactions between sediments and freshwater. SIL-UNESCO symposium, Sept. 1976. Amsterdam, The Netherlands.
- Tirén, T., Thorin, J. & Nömmik, H., 1976: Denitrification measurements in lakes. — Acta Agr. Scand. 26: 175–184.