1. Bockris, J.O'M. 1977.Environmental Chemistry, 412N.Y. and London: Plenum Press.
2. Goldberg, E.D. 1976.The Healt of the Oceans, 76Roma: Newton Compton. Ed. ital. translation
3. Hutzinger, O., Safe, S. and Zitko, VB. 1974.The Chemistry of PCB's, 1Cleveland, Ohio: CRC Press.
4. Pavlou, S.P., Dexter, R.N. and Clayton, J.R. Jr. 1974. Proc. Int. Conf. Transport of Persistent Chemicals in Acquatic Ecosystems. 1974, Ottawa. pp.102
5. Fossato, V.U. and Craboledda, L. 1980.VesJournées Etud. Pollutions, 169Cagliari: C.I.E.S.M.