*Mathis Wackernagel, William E. Rees [http://www.sciencedirect.com/science/article/pii/S0921800996000778 Perceptual and structural barriers to investing in natural capital: Economics from an ecological footprint perspective], Ecological Economics, Volume 20, Issue 1, January 1997, Pages 3-24 | *Mathis Wackernagel, William E. Rees [http://www.sciencedirect.com/science/article/pii/S0921800996000778 Perceptual and structural barriers to investing in natural capital: Economics from an ecological footprint perspective], Ecological Economics, Volume 20, Issue 1, January 1997, Pages 3-24 |