References
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- EPA (U.S. Environmental Protection Agency), 1974: An approach to a relative trophic index system for classifying lakes and reservoirs. — Working paper N ° 24, Corvallis.
- IRSA (Istituto di Ricerca Sulle Acque), 1980: A survey on lakes water quality. — IRSA, Quaderni, 43, 377 ppg. (in Italian, summary in English).
- Gaggino, G. F., Cappelletti, E., Marchetti, R. & Calcagnini, T., 1985: Water Quality of Italians Lakes in the Eighties. Proc. Int. Congr. “Lakes Pollution and Recovery”, Rome 1985. — EWPCA, 1–32.
- Marchetti, R., Gaggino, G. F. & Provini, A., 1984: Coastal water eutrophication: the Emilia Romagna Case. — Acqua & Aria 8: 829–837 (in Italian, summary in English).
- OECD (Organization for Economic Cooperation and Development), 1982: Eutrophication of waters. Monitoring, Assessment and Control. — OECD, Paris.
- Vighi, M. & Chiaudani, G., 1985: A simple method to estimate lake phosphorus concentrations resulting from natural, background, loadings. — Water Res. 19: 987–991.