[129] Stutz, J. et al., 2001: "Waste trends and outlook - Background document for the OECD Environmental Outlook for chapter 20: Waste", Parijs: Organisatie voor Economische Samenwerking en Ontwikkeling, blz. 26.
[129] Stutz, J. et al., OECD: "Waste trends and outlook - Background document for the OECD Environmental Outlook for chapter 20: Waste", S. 26, Paris 2001.