1. ORCA (1994)Guidelines for the Evaluation of Feedstock for Source Separated Biowaste Composting and Biogasification, Organic Reclamation and Composting Association, Brussels, Belgium.
2. Anonymous (1993)Warmer Bull. 38, 10.
3. Anonymous (1993)Warmer Bull. 39, 11.
4. Anonymous (1994)Warmer Bull. 41, 16.
5. European Union (1994) Directive 94/62/EC of the European Parliament and of the Council on Packaging and Packaging Waste. Brussels, Dec. 5.