1. 1Frost & Sullivan: Energy Harvesting Materials-The Road Ahead. Technical Insights, Report 2009.
2. 2 P. Harrop and R. Das , “Energy Harvesting and Storage for Electronic Devices 2009-2019-Electronic”; Report, IDTechEx, 2009.
3. 4 L. W. Doremus , “Charge Release of Several Ceramic Ferroelectrics Under Various Temperature and Stress Conditions,” Proc. Inst. Radio Engrs., 47, 921-4 (1959).
4. 5 A. E. Crawford , “Use in Ignition Systems for Internal Combustion Engines and Explosive Missiles”; pp. 1226-8, Proceedings of the 3rd International Congress on Acou s tics, Stuttgart, September 1959.