1. Lavere klimagassutslipp i 2011;Statistisk Sentralbyrå,2012
2. Facts 2012 – The Norwegian Petroleum Sector;Norwegian Ministry of Petroleum and Energy,2012
3. Norway to set high carbon tax on oil and gas production,2012
4. Energy Optimization on Offshore Installations with Emphasis on Offshore and Combined Cycle Plants;Kloster,1999
5. Reduction of Emissions to Air Through Energy Optimisation on Offshore Installations;Kloster,2000