| Views | |
| Vertical integration in the market for North Sea oil | 246 |
| May 2012 | June 2012 | July 2012 | August 2012 | September 2012 | October 2012 | November 2012 | December 2012 | January 2013 | February 2013 | March 2013 | |
| Vertical integration in the market for North Sea oil | 5 | 2 | 4 | 2 | 2 | 6 | 4 | 14 | 22 | 9 | 2 |
| Views | |
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| Views | |
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