1. Wohlstand durch Produktivität — Deutschland im internationalen Vergleich;Bormann,2009
2. The economics of the coming spaceship earth;Boulding,1966
3. Is numerairology the future of monetary economics?;Buiter,2007
4. Overcoming the zero bound on nominal interest rates with negative interest on currency — Gesell's solution;Buiter;The Economic Journal,2003
5. Einführung in die Ökologische Ökonomik, Utb, Stuttgart;Costanza,2001