tokens: Other interests are owned by BP Petroleum Development -LRB- SES -RRB- Ltd. , C. Itoh Energy Co. Ltd. , Deminex Sumatra OEL G.m.b . H. , Hispanoil -LRB- Sumatra -RRB- Production Ltd. , Hudbay Oil -LRB- Indonesia -RRB- Ltd. , Inpex Sumatra Co. Ltd. , Lasmo Sumatra Ltd. , Sunda Shell , TCR Sumat A.G. and Warrior Oil Co .