1. See f.i. Weterings, R.A.P.M., Opschoor, J.B., 1992 “The Ecocapacity as a challenge to Technological Development”, RMNO Publication No. 74a, The Netherlands.
2. Our Common Future,1987
3. The Life Cycle Concept as a Basis for Sustainable Industrial Production;Alting;Annals of the CIRP,1993
4. “Earth Summit - Agenda 21,1993
5. Life Cycle Design;Alting;Concurrent Engineering: Issues, Practice and Technology,1991