References
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- Golterman, H. L. (ed.), 1969: Methods for chemical analysis of freshwater. — IBP Handbook 8 Blackwell, Oxford.
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- Murphy, J. & Riley, J. P., 1962: A modified single solution method for the determination of phosphate in natural waters. — Anal. Chem. Acta 27: 31–36.
- Strickland, J. D. & Parson, T. R., 1965: A manual of sea water analysis. — Bull. Fish. Res. Bd. Can. 125: 203 pp.
- Ziegler, R. & Egle, K., 1965: Zur quantitativen Analyse der Chloroplastenpigmente. I. — Beitr. Biol. Pfl. 41: 11–37.