References
- Allan, R. J. & Williams, J. D. H., 1978: Trophic status related to sediment chemistry of Canadian Prairie lakes. — J. Environ. Qual. 7: 99–106.
- Bostrom, B., Jansson, M. & Forsberg, C., 1982: Phosphorus release from lake sediments. — Arch. Hydrobiol. Beih. Ergebn. Limnol. 18: 5–59.
- De Pinto, J., Young, T. C. & Martin, S. C, 1981: Algal available phosphorus in suspended sediments from lower Great Lakes tributaries. — J. Great Lakes Res. 7: 311–325.
- Epa, 1971: Algal Assay Bottle Test. — National Eutrophication Program, Corvallis, Oregon.
- Glober, D. C. & Davies, E., 1981: Sediments as a source of phosphate: a study of 38 impoundments. — Water S.A. 7: 54–60.
- Golterman, H. L., 1977: Sediments as a source of phosphate for algal growth. — In: H. L. Golterman (ed.), Symposium on Interaction between sediments and freshwater. 286–293
- Amsterdam Sept. 6–12,1976. W. Junk, The Hague.
- Hegemann, D. A. & Keenan, J., 1983: Bioassay technique for soil-nutrient availability. — Water, Air, Soil Pollution 19: 259–276.
- Jackson, M. L., 1964: Soil chemical analysis. — Prentice Hall Inc., Englewood Cliffs, N. Y., 498 pp.
- Lee, G. F., Jones, R. A. & Rast, W., 1980: Availability of phosphorus to phytoplankton and its implications for P management strategies. — In: Phosphorus management for lakes: 259–308. Ann Arbor, Interscience.
- Logan, T. J., Verhoff, F. H. & De Pinto, J. V., 1979: Biological availability of total phosphate. — Techn. Series Report, Lake Erie Wastewater Management Study, Buffalo, N. Y.
- Premazzi, G., Marengo, G. & Rossi, G., 1981 a: Phosphorus mass balance in a eutrophic subalpine lake. — Verh. Internat. Verein. Limnol. 21: 484–491.
- Premazzi, G., Marengo, G., Binda, S. & Amantini, L., 1981 b: Interstitial inorganic P levels in Ponte Tresa basin. — 1° National Congress of Italian Society of Ecology: 161–165. Salsomaggiore 21–24 Oct. 1980.
- Premazzi, G. & Provini, A.: Internal P loading in lakes: a different approach to its evaluation. — In preparation.
- Schmid, M. & AmbÜHl, H., 1965: Die Bestimmung geringster Mengen von Gesamt-Phosphor im Wasser von Binnenseen. — Schweiz. Z. Hydrol. 27: 184–192.
- Smith, E. A. & Mayfield, C. I., 1978: Naturally occurring of apatite as a source of orthophosphate for growth of bacteria and algae. — Microb. Ecol. 4: 105–117.
- Smith, E. A., Mayfield, C. I. & Wong, P. T., 1977: Effects of P from apatite on development of freshwater communities. — J. Fish. Res. Bd. Can. 34: 2405–2409.
- Stumm, W. & Leckie, J. O., 1971: Phosphate exchange with sediments, its role in the productivity of surface waters. — Proc. Fifth Int. Water Poll. Res. Conf.; Pergamon Press.
- Wildung, R. E. & Schmidt, R. L., 1973: Phosphorus release from lake sediments. — Office of Research and Monitoring, Washington D. C., EPA R3-73-04, 185 pp.
- Williams, J. D. H., Jacquet, J. R. & Thomas, R. L., 1976: Forms of phosphorus in the surficial sediments of Lake Erie. – J. Fish. Biol. Can. 33: 413–429.
- Williams, J. D. H., Shear, H. & Thomas, R. L., 1980: Availability to Scenedesmus quadricauda of different forms of phosphorus in sedimentary materials from the Great Lakes. — Limnol. Oceanogr. 25: 1–11.