A top oil official in the Republic of Congo...[Denis Gokana , head of the state oil company Société Nationale des pétroles du Congo, SNPC] has been secretly selling hundreds of millions of dollars in cut-price oil to private companies he himself owns, a new briefing by Global Witness highlights...Congo provides a clear example of the way mismanagement of oil wealth not only fails to make countries richer, but can entrench corruption and instability. [also refers to Sphynx UK, Sphynx Bermuda, Africa Oil and Gas Corporation (AOGC), Marine XI, SOCO International, Energem]