Comparison of China's oil import risk: Results based on portfolio theory and a diversification index approach
Energy Policy
Volume 37, Issue 9, September 2009, Pages 3557–3565
http://www.sciencedirect.com/science/article/pii/S0301421509002626
Assessing the energy vulnerability: Case of industrialised countriesEdgard Gnansounou,
Energy Policy
Volume 36, Issue 10, October 2008, Pages 3734–3744
http://www.sciencedirect.com/science/article/pii/S0301421508003510
Oil vulnerability index of oil-importing countries
E*****a Gupta
Energy Policy
Volume 36, Issue 3, March 2008, Pages 1195–1211
http://www.sciencedirect.com/science/article/pii/S0301421507005022
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