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- [9] Cointegration andcausality analysis of world vegetable oil and crude oilprices. Yu T.H,Bessler D.A,Fuller S. the American Agricultural Economics Association AnnualMeeting . 2006
- [10] Cointegration andcausality analysis of world vegetable oil and crude oilprices. Yu T.H,Bessler D.A,Fuller S. the American Agricultural Economics Association AnnualMeeting . 2006