Bin Chen Nong Xiao Zhiping Cai Zhiying Wang An Optimized COW Block Device Driver in VMM for Fast, On-Demand Software Deployment. 387-392 2008 EUC (2) http://dx.doi.org/10.1109/EUC.2008.167 conf/euc/2008-2 db/conf/euc/euc2008-2.html#ChenXCW08