References
- Anderson, M. A. & Morel, F. M. M., 1982: The influence of aqueous iron chemistry on the uptake of iron by the coastal diatom Thalassiosira weissflogii. — Limnol. Oceanogr. 27: 789–813.
- Borchers, R., 1959: Spectrophotometric determination of amino-acids. Alkaline copper salt method using Cuprizone, bis(cyclohexanone)oxalyldihydrazone. — Anal. Chem. 31: 1179–1180.
- Buffle, J. & Deladoey, P., 1982: Analysis and characterization of natural organic matter in freshwaters. II. Comparison of the properties of waters of various origins and their annual trend. — Schweiz. Z. Hydrol. 44: 363–391.
- De Haan, H., 1972: Molecule size distribution of soluble humic compounds from different natural waters. — Freshwat Biol. 2: 235–241.
- De Haan, H., 1982: Physico-chemical environment in Tjeukemeer with special reference to speciation of algal nutrients. — Hydrobiologia 95: 205–221.
- De Haan, H. & De Boer, T., 1978: A study of the possible interactions between fulvic acids, amino acids and carbohydrates from Tjeukemeer, based on gel filtration at pH 7.0. — Water Res. 12: 1035–1040.
- De Haan, H., De Boer, T., Kramer, H. A. & Voerman, J., 1982: Applicability of light absorbance as a measure of organic carbon in humic lake water. — Water Res. 16: 1047–1050.
- Huntsman, S. A. & Sunda, W. G., 1980: The role of trace metals in regulating phytoplankton growth. — In: I. Morris (ed.), Studies in ecology 7. The physiological ecology of phytoplankton: 285–328. Blackwell Sci. Publ.
- Laxen, D. P. H. & Chandler, I. M., 1982: Comparison of filtration techniques for size distribution in freshwaters. –Anal. Chem. 54: 1350–1355.
- Pearl, H. W. & Downes, M. T., 1978: Biological availability of low versus high molecular weight reactive phosphorus. — J. Fish. Res. Board Can. 35: 1639–1643.
- Stumm, W. & Morgan, J. J., 1970: Aquatic Chemistry. An introduction emphasizing chemical equilibria in natural waters. – Wiley–Interscience.
- Wagemann, R. & Brunskill, G. J., 1975: The effect of filter pore-size on analytical concentrations of some trace elements in filtrates of natural water. — Intern. J. Environ. Anal. Chem. 4: 75–84.
- White, E. & Payne, G., 1980: Distribution and biological availability of reactive high molecular weight phosphorus in natural waters in New Zealand. — Can. J. Fish. Aquat. Sci 37: 664–669.