Yuri Demchenko Canh Ngo Cees de Laat Tomasz Wiktor Wlodarczyk Chunming Rong Wolfgang Ziegler Security Infrastructure for On-demand Provisioned Cloud Infrastructure Services. 255-263 2011 CloudCom http://doi.ieeecomputersociety.org/10.1109/CloudCom.2011.42 conf/cloudcom/2011 db/conf/cloudcom/cloudcom2011.html#DemchenkoNLWRZ11