1. Althaus H-J, Blaser S, Classen M, Jungblulth N. Life cycle inventories of metals. Final report Ecoinvent 2000, vol. 10. Dübendorf, Switzerland: Swiss Centre for LCI, EMPA-DU; 2003.
2. Öko-inventare von Energiesystemen;Frischknecht,1996
3. Ecobilan. TEAM/DEAM. Rockville, MD: PriceWaterhouseCoopers; 2001.
4. IVAM LCA data 2.0. IVAM environmental research;Lindeijer,1998
5. Quantitative assessment of worldwide contamination of the air, water and soils with trace metals;Nriagu;Nature,1988