1. Environmental life cycle analysis of products: backgrounds and guide;Heijungs,1992
2. The Nordic guidelines on life-cycle assessment, Nord;Lindfors,1995
3. Ecological footprints and appropriated carrying capacity: measuring the natural capital requirement of the human economy;Rees,1994
4. Factor Vier: Doppelter Wohlstand — halbierter Naturverbrauch;Von Weizsäcker,1995
5. Factor four doubling wealth — halving resource use;Von Weizsäcker,1997