1. COPERT II—Computer programme to calculate emissions from road transport. European Environment Agency—European Topic Center on Air Emissions, November 1997.
2. Zero emissions: the ultimate goal of cleaner production;Pauli;J Clean Prod,1997
3. Swiss Agency for the Environment, Forests and Landscape (SAEFL). Life cycle inventories for packagings, Vols. I–II. Berne; 1998.
4. SimaPro. Method: Eco-Indicator ‘95, Europe g. PRe Consultants BV. Amersfoort, The Netherlands, http://www.simapro.com.