Junjie Lv Juling Rong Virtualisation security risk assessment for enterprise cloud services based on stochastic game nets model. 7-14 2018 12 IET Inf. Secur. 1 https://doi.org/10.1049/iet-ifs.2017.0038 db/journals/iet-ifs/iet-ifs12.html#LvR18