1. (1)B. Dunham, "Automatic on/off switching gives 10-percent gas saving," Popular Science, vol. 205, no. 4, pp. 170, Oct. 1974.
2. (2)C. Chan, "The state of the art of electric, hybrid, and fuel cell vehicles," Proc. IEEE, vol. 95, no. 4, pp. 704−718, April 2007.
3. (4)D. Jeong and W. Jeon, "Performance of adaptive sleep period control for wireless communications systems," IEEE Trans. Wirel. Commun., vol. 5, no. 11, pp. 3012−3016, Nov. 2006.
4. (5)L. Kong, G. Wong, and D. Tsang, "Performance study and system optimization on sleep mode operation in IEEE 802.16e," IEEE Trans. Wirel. Commun., vol. 8, no. 9, pp. 4518−4528, Sept. 2009.
5. (6)G. K. Wallace, "The JPEG still picture compression standard," Commun. ACM, vol. 34, no. 4, pp. 30−44, April 1991.