1. Metals recycling: economic and environmental implication;Ayres;Resources Conserv. Recycling,1997
2. Berglund M, Börjesson P. Energianalys av biogassystem (Energy analysis of biogas systems). Report No. 44, Department of Technology and Society, Environmental and Energy Systems Studies, Lund University, Lund, Sweden; 2003 [in Swedish].
3. Boustedt. Ecoprofiles of plastics and related intermediates. Brussels, Belgium: APME; 1999.
4. Dahlroth B. Avfall & Energi (Waste & energy). Stockholm, Sweden; 1998. ISBN 91-630-7345-5 [in Swedish].
5. Eriksson O. Environmental and economic assessment of swedish municipal solid waste management in a systems perspective. Doctoral thesis, Industrial Ecology, Department of Chemical Engineering and Technology, Royal Institute of Technology, Stockholm, Sweden; 2003.