1. Progress Report on Clean and Efficient Automotive Technologies under Development at EPA, Interim Technical Report, EPA, January 2004
2. EPA, Draft Report on the Environment, 2003
3. R.P. Kepner, Hydraulic power assist: a demonstration of hydraulic hybrid vehicle braking regenerative braking in a road vehicle application, SAE technical paper 2002-01-3128
4. Mohaghegh Motlagh, A., Elahinia, M. H., Abuhaiba, M. and Olson, W. Application of smart materials for noise and vibration of hydraulic systems. ASME DETC/CIE. September4–7, Las Vegas, NV.