1. Binnie & Partners Consulting Engineers. Water and waste-water management in the metal finishing industry. WRC Project No. 145, Pretoria; October 1987.
2. Kothuis B, Janisch C, van Beers D. Barriers and drivers to cleaner production and industrial symbiosis for small and medium sized enterprises in South Africa. In: Industrial Symbiosis Project, Environmental Process Engineering Group, Department of Chemical Engineering, University of Cape Town, Rondebosch, 7700, South Africa, 2000.
3. Janish CH. An assessment of the potential for waste minimisation within small, medium enterprizes in the metal finishing industry in South Africa. M.Sc. Eng. Thesis; June 2000.
4. Koefoed M. Completion report for cleaner production metal finishing industry, South Africa 2000–04 for Danida, Copenhagen. For official use only; 2004.
5. Environmental Monitoring Group. Clean production – a preliminary assessment of the need and potential for the introduction of clean technology in some industrial sectors in South Africa; 1993.