References
- Gerhardt, D. Z. & Likens, G. E., 1975: Enrichment experiments for determining nutrient limitation; four methods compared. — Limnol. Oceanogr. 20: 649–653.
- Healey, F. P., 1979: Short-term responses of nutrient-deficient algae to nutrient addition. — J. Phycol. 15: 289–299.
- Morris, I., Yentsch, C. M. & Yentsch, C. S., 1971: The physiological state with respect to nitrogen of phytoplankton from low-nutrient subtropical water as measured by the effect of ammonium ion on dark carbon dioxide fixation. — Limnol. Oceanogr. 16: 859–868.
- O'Brien, W. J. & Denoyelles, F., 1976: Response of three phytoplankton bioassay techniques in experimental ponds of known limiting nutrient. — Hydrobiologia 49: 65–76.
- Syrett, P. J., 1962: Nitrogen assimilation. — In: Physiology and Biochemistry of Algae: 171–188. R. A. Lewin (ed.). Academic Press, N. Y.
- Vincent, W. F., 1981: Rapid physiological assays for nutrient demand by the plankton. I. Nitrogen. — J. Plankton Res. 3: 685–697.
- Yentsch, C. M., Yentsch, C. S. & Strube, L. R., 1977: Variations in ammonium enhancement, an indication of nitrogen deficiency in New England coastal phytoplankton populations. — J. Mar. Res. 35: 537–555.