References
- APHA, AWWA, WPCF, 1981: Standard Methods for the Examination of Water and Wastewater. — Am. Publ. Health Ass., Washington. 1134 pp.
- Callieri, C. & Heinimaa, S., 1997: Microbial loop in the large subalpine lakes. — Mem. 1st. Ital. Idrobiol. 56: 143–156.
- Kiørboe, T., & Hansen, J., 1993: Phytoplankton aggregate formation: observations of patterns and mechanisms of cell sticking and the significance of exopolymeric material. — J. Plankton Res. 15: 993–1018.
- MacIsaac, E. A., & Stockner, J. G., 1993: Enumeration of phototrophic picoplankton by autofluorescence microscopy. — In: Kemp, P. F., Sherr, B. F., Sherr, E. B. & Cole, J. J. (eds), Handbook of Methods in Aquatic Microbial Ecology: 187–197. — Lewis Publ.
- Manca, M., Calderoni, A., & Mosello, R., 1992: Limnological research in Lago Maggiore: studies on hydrochemistry and plankton. — In: Guillizzoni, P., Tartari, G. & Giussani, G. (eds): — Limnology in Italy, — Mem. Ist. Ital. Idrobiol. 50: 171–200.
- Padisak, J., Krienitz, L., Koschel, R., & Nedoma, J., 1997: Deep-layer autotrophic picoplankton maximum in the oligotrophic Lake Stechlin, Germany: origin, activity, development and erosion. — Eur. J. Phycol. 32: 403–416.
- Pearl, H. W., 1994: Spatial segregation of CO2 fixation in Trichodesmium sp.: linkage to N2 fixation potential. — J. Phycol. 30: 790–799.
- Stockner, J. G. & Antia, N. J., 1986: Algal picoplankton from marine and freshwater: a multidisciplinary perspective. — Can. J. Fish. Aquat. Sci. 43: 2472–2503.
- Stockner, J., Callieri, C., & Cronberg, G., 2000: Picoplankton and other non-bloom forming cyanobacteria in lakes. — In: Whitton, B. & Potts, M. (eds), Ecology of Cyanobacteria: Their Diversity in Time and Space. 195–231. — Kluwer Academic Publishers.
- Valderrama, J. C., 1981: The simultaneous analysis of total nitrogen and total phosphorus in natural waters. — Mar. Chem. 10: 109–122.