1. Goldberg, R.P.: A Survey of Virtual Machine Research. IEEE Computer 7, 34–45 (1974)
2. Amazon Elastic Computing Cloud,
http://aws.amazon.com/ec2
3. GoGrid: Scalable Load-Balanced Windows and Linux Cloud-Server Hosting,
http://www.gogrid.com/
4. Nimbus Cloud,
http://www.workspace.globus.org
5. OpenNebula Project,
http://www.opennebula.org