1. L. Hodges, ?Environmental Pollution?, Holt-Rinehart and Winston Inc., New York (1973).
2. G. Degremont, ?Water Treatment Handbook?, Bailey Bros, and Swinfen, Folkestone (1973).
3. H. Lund, ?Industrial Pollution Control Handbook?, McGraw-Hill, New York (1971).
4. A. Kuhn, ?Electrochemistry of Cleaner Environment?, (edited by J. O'M. Bockris) Plenum Press, New York (1972).
5. E. A. El-Ghaoui and R. E. W. Jansson,J. Appl. Electrochem. 12 (1982) 75.