1. Heijungs R, Guinée JB, Huppes G, Lankreijer RM, Udo De Haes HA, Wegener Sleeswijk A, Ansems AAM, Eggels PG, van Duin R, de Goede HP. Environmental life cycle analysis of products: backgrounds, 130 pp. and Guide, 96 pp., Centre of Environmental Science, Leiden University, 1992.
2. Lindfors L-G, Christiansen K, Hoffman L, Virtanen Y, Juntilla V, Hanssen O-J, Ronning A, Ekvall T, Finnveden G. (1995). The Nordic guidelines on life-cycle assessment, Nord 1995:20. Copenhagen: Nordic Council of Ministers.
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