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2. ConocoPhillips, 2010. Annual Report, 〈http://www.conocophillips.com/EN/about/company_reports/annual_report/Documents/2010_SummaryAnnualReport.pdf, last visited 15 July, 2011〉.
3. Data Monitor, 2009. Oil & Gas in Germany, France, Netherlands, Spain, Italy, Belgium, Industry Profile, 〈www.datamonitor〉.
4. Direction de l´Énergie, Ministére de l´Ecologie, de l´Énergie, 2010. L´industrie petrolière et gazière en 2009, 〈www.devepoppement-durable.gouv.fr〉.
5. Eni, 2010. Annual Report, 〈http://www.eni.com/attachments/publications/reports/reports-2010/Annual-Report-2010.pdf, last visited 15 July, 2011〉.