In the 2012 book, The Biosphere, edited by UNESCO Division Chief Dr Natarajan Ishwaran, I have contributed Chapter 8,

The Materially Finite Global Economy Metered in a Unified Physical Currency

and the free online access link is:

http://www.intechopen.com/articles/show/title/the-materially-finite-global-economy-metered-in-a-unified-physical-currency

Of course you have to be on drugs to understand it.