References
- Bombówna, M., 1970: Chlorophyllgehalt der Aufwuchsalgen als Anzeiger der Bioaktivität des Flusses. — Fortschr. Wasserchemie (in print).
- Lund, J. W. G., Jaworski, G. H. M., & Bucka, H., 1971: A technique for bioassay of freshwater, with special reference to algal ecology. — Acta Hydrobiol. 13, 3, 235–249.
- Starzecki, W., 1961: An improved microrespirometer and extension of its application over plants with big leaves. — Acta Soc. Bot. Pol. 30, 326–343.
- Zurztcki, J., 1955: A micromethod for measuring photosynthesis. — Experientia 11, 261.