References
- Holmbom, B., Hemming, J. & MÄKi-Arvela, P., 1992: Environmental fate of effluent components from the Kaukas pulp and paper mill in South Saimaa Lake System. — Univ. Joensuu. Puhl. Karelian Inst. 103: 39–45.
- Holopainen, A-L., Huttunen, P., Letanskaya, G. & Protopopova, E., 1996: The trophic state of Lake Ladoga as indicated by late summer phytoplankton. — Hydrobiologia 322: 9–16.
- Huttula, T., Koponen J., Lehtinen, K., Wahlgren, A. & Niinioja, R., 1996: Water currents and spreading of river load in Lake Pyhäselkä, Saimaa, Finland. — Hydrobiologia 322: 117–124.
- Karjalainen, J., Holopainen, A-L. & Huttunen, P., 1996: Spatial patterns and relationships between phytoplankton, zooplankton and water quality in the Saimaa lake system, Finland. — Hydrobiologia 322: 267–276.
- Karjalainen J., Rahkola, M., Holopainen, A-L., Huttula, T., Jurvelius, J., Viljanen, M., Avinski, V., Letanskaya, G. & Telesh, I., 1999: Trophic gradients and associated changes in the plankton community in two bays of Lake Ladoga. — Boreal Env. Res. 4: 229–238.
- LeppÄ, M., Karjalainen, J. & Holopainen A-L., 1995: In vivo fluorescence and chlorophyll a determination in Finnish humic lakes. — Aqua Fenn. 25: 33–38.
- Mccauley, E. & Kalff, J., 1981: Empirical relationship between phytoplankton and zooplankton biomass in lakes. — Can. J. Fish. Aquat. Sci. 38: 458–463.
- Porter, K. G., 1977: The plant-animal interface in freshwater ecosystems. — Am. Sci. 65: 159–170.
- Rahkola, M., Karjalainen, J. & Viljanen, M., 1994: Evaluation of pumping system for sampling zooplankton. — J. Plankton Res. 16: 905–910.
- Virtanen, M. & Manninen, P., 2000: Four years' observations for the modeling of Lake Haukivesi, eastern Finland. — Univ. Joensuu. Publ. Karelian Inst. 129: 468–475.