References
- Gerhart, D. Z. & Likens, G. E., 1975: Enrichment experiments for determining nutrient limitation: four methods compared. — Limnol. Oceanogr. 20: 649–653.
- Lindholm, T., 1975: Coastal meromictic lakes on Åland (SW Finland). — Aqua Fennica 1975: 24–40.