1. Unitax: a new environmentally sensitive concept in taxation;Slesser,1989
2. Exergy, ecology and democracy — concepts of vital society;Wall,1993
3. On exergetics, economics and optimization of technical processes to meet environmental conditions;Gong,1997
4. Green fees: how a tax shift can work for the environment and the economy;Repetto,1992
5. Factor four. Doubled well-being — twice smaller consumption of natural resources (in German);von Weizsäcker,1996