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An empirical analysis of the risk of crude oil imports in China using improved portfolio approach 期刊论文
ENERGY POLICY, 2007, 卷号: 35, 期号: 8, 页码: 4190-4199
作者:  Wu, Gang;  Wei, Yi-Ming;  Fan, Ying;  Liu, Lan-Cui
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risk index  crude oil import risk  diversification