Sue Wing, I., and R.S. Eckaus(2005):The Decline in US Energy Intensity: Its Origins and Implications for Long-Run CO2 Emission Projections.Conference Proceedings, Symposium NCCR 2005: Interfaces between Climate and Economic Dynamics(http://ecolu-info.unige.ch/~nccrwp4/GEMINI-E3/Interlaken.htm)
Conference Proceedings Paper
The Decline in US Energy Intensity: Its Origins and Implications for Long-Run CO2 Emission Projections