References
- Eloranta, P., 1999: Water colour and Secchi disk visibility. — In: Keskitalo, J. & Eloranta, P. (Ed.): Limnology of Humic waters: 70. Backhuys Publisher, Leiden, The Netherlands.
- Forsberg, C. & Ryding, S., 1980: Eutrophication parameters and trophic state indices in 30 Swedish waste-reciewing lakes. — Arch. Hydrobiol. 89: 189–207.
- Haney, J.F., 1993: Environmental control of diel vertical migration behaviour. — Arch. Hydrobiol. Beih. 39: 1–17.
- Heinonen, P., 1980: Quantity and composition of phytoplankton in Finnish inland waters. — Publications of the water research institute 37: 1–91.
- Jones, R., 1993: Phytoplankton migrations: patterns, processes and profits. — Arch. Hydrobiol. Beih. 39: 67–77.
- Keskitalo, J. & Salonen, K., 1994: Manual for integrated monitoring: sub programme hydrobiology of lakes. — National Board of Waters and the Environment 1994, Helsinki. Publ. National Board of Waters and the Env. Serie B: 16, 41 pp.
- Lampert, W., 1993: Ultimate causes of diel vertical migration of zooplankton: New evidence for the predation-avoidance hypothesis. — Arch. Hydrobiol. Beih. 39: 79–88.
- Lampert, W. & Sommer, U., 1997: Limnoecology: The ecology of Lakes and Streams. — Oxford University Press, New York. 382 pp.
- Mononen, P. & Niinioja, R., 1993: Nutrient and chlorophyll concentrations in the northern part of Lake Saimaa, Finland. — Verh. Internat. Verein. Limnol. 25: 544–547.
- Zaret, T.M. & Suffern, J.S., 1976: Vertical migration in zooplankton as a predator avoidance mechanism. — Limnol. Oceanogr. 21: 804–813.