Energy Efficiency Improvement and Cost Saving Opportunities for the Petrochemical Industry An ENERGY STAR® Guide for Energy and Plant Managers. 2008. LBNL-964E..
World Best Practice Energy Intensity Values for Selected Industrial Sectors. Lawrence Berkeley National Laboratory, 2008. LBNL-62806..
"Climate Change 2014 Mitigation of Climate Change." IPCC 5th Assessment Report. The Intergovernmental Panel on Climate Change, 2014..