References
- Barbanti, L., Bonacina, C., Bonomi, G. & Ruggiu, D., 1972: Orta Lake: present situation and forecast of its evolution on the basis of different hypothesis of management. — Ed. 1st. Ital. Idrobiol., Pallanza, 113 pp. (in Italian).
- Baudo, R., Galanti, G., Guilizzoni, P. & Varini, P. G., 1981: Heavy metals interaction between water and sediments in a small meso-eutrophic lake (Lake Pozzo di Riva, Northern Italy). — Verh. Internat. Verein. Limnol. 21: 473–476.
- Bonacina, C., 1970: Lake Orta: further evolution of chemical status and of planktonic biocenosis structure. — Mem. 1st. Ital. Idrobiol. 26: 141–204 (in Italian, summary in English).
- Bonacina, C., Bonomi, G. & Ruggiu, D., 1973: Reduction of the industrial pollution of Lake Orta (N-Italy): an attempt to evaluate its consequences. — Mem. 1st. Ital. Idrobiol. 30: 149–168.
- Corbella, C., Tonolu, V. & Tonolli, L., 1958: Lake Orta sediments as witness of a dramatic cuproammonia pollution. — Mem. 1st. Ital. Idrobiol. 10: 9–50 (in Italian, summary in English).
- Förstner, U., 1982: Accumulative phases for heavy metals in limnic sediments. — In: Sediment/ Freshwater interactions: 269–284, P. G. Sly (ed.). Junk Publ., The Hague.
- Gerletti, M. & Provini, A., 1978: Effert of nitrification in Orta Lake. — Prog. Wat. Tech. 10: 839–851.
- Julshamm, K. & Braekkan, O. R., 1975: Determination of trace elements in fish tissues by the standard addition method. — At. Absorption Newslett. 14: 49–52.
- Pickering, W. F., 1979: Copper retention by soil/sediment components. — In: Copper in the environment. Part 1: ecological cycling: 217–254, J. O. Nriagu (ed.). J. Wiley & Sons, Inc., New York.
- Thornton, I., 1979: Copper in soils and sediments. — In: Copper in the environment. Part 1: ecological cycling: 171–216, J. O. Nriagu (ed.). J. Wiley & Sons, Inc., New York.
- Tonolli, V. & Vollenweider, R. A., 1961: The history of Lake Orta polluted by copper and ammonia discharges. — Proc. Symp. Acque di Scarico Industriali: 99–109 (in Italian).
- Vollenweider, R. A., 1963: Studies on the present situation of chemical and biological characteristics of Lake Orta. — Mem. Ist. Ital. Idrobiol. 16: 21–125 (in Italian, summary in English).