Vidal, John. „Shell oil paid Nigerian military to put down protests, court documents show”, The Guardian, 2011. október 3. (Hozzáférés: 2011. október 5.) „Confidential memos, faxes, witness statements and other documents, released in 2009, show the company regularly paid the military to stop the peaceful protest movement against the pollution […] In 2009, in a New York federal court, that evidence never saw light during the trial.”
