Huacai Chen Hai Jin Zhiyuan Shao Ke Yu Kun Tian ClientVisor: leverage COTS OS functionalities for power management in virtualized desktop environment. 131-140 2009 VEE http://doi.acm.org/10.1145/1508293.1508312 conf/vee/2009 db/conf/vee/vee2009.html#ChenJSYT09