Amsterdam, Robert (12 June 2008). "TNK-BP Is Hurting Russia". Robertamsterdam.com. Archived from the original on 7 December 2009. Retrieved 28 July 2010.
Amsterdam, Robert (12 June 2008). "TNK-BP Is Hurting Russia". Robertamsterdam.com. Archived from the original on 7 December 2009. Retrieved 28 July 2010.