Quantifying the risk to crude oil imports in China: An improved portfolio approach
1997 ◽
Vol 21
(1-2)
◽
pp. S893-S897
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2015 ◽
Vol 9
(1)
◽
pp. 1
◽
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2020 ◽
Vol 13
(2)
◽
pp. 105-109
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