1. Mining the oceans: can we extract minerals from seawater?;Bardi;Oil Drum Eur,2009
2. Copper Alliance,2015
3. Long term trends in the Real real process of primary commodities: inflation bias and the Prebisch-Singer hypothesis;Cuddington;Resour. Policy,2010
4. Economic Theory and Exhaustible Resources;Dasgupta,1979
5. Resource Productivity, Competitiveness and Environmental Policies;De Bruyn,2009