@article{mosharaf09,
 author = {Chowdhury, N. M. Mosharaf Kabir and Boutaba, Raouf},
 title = {Network virtualization: state of the art and research challenges},
 journal = {Comm. Mag.},
 volume = {47},
 issue = {7},
 month = {July},
 year = {2009},
 pages = {20--26},
 publisher = {IEEE Press},
}