1. Council Directive 96/61/EC of 24 September 1996 concerning integrated pollution prevention and control.
2. BREF – reference document on best available techniques surface treatment of metals and plastic materials using electrolytic or chemical process (volume of treatment vats > 30 m3),2001
3. Pollution prevention for the metals finishing industry – a manual for pollution prevention technical assistance providers;Anderson,1993
4. Profile of the fabricated metal products industry,1995