1. Mell, P., Grance, T.: The nist definition of cloud computing (2011). http://csrc.nist.gov/publications/nistpubs/800-145/SP800-145.pdf
2. Jerry, A., Alan, B., Dave, C., Nils, P., Paul, K., Jim, R.: Defined categories of service 2011. In: Cloud Security Alliance, Security as a Service Working Group (2011). http://www.cloudsecurityalliance.org/guidance
3. Janessa, R.: Gartner says cloud based security services market to reach 2.1 billion in 2013. Gartner, Technical report, October 2013. http://www.gartner.com/newsroom/id/2616115
4. Rafal, L., Dave, S., Bryan, S., Luciano, J.S.: The notorious nine: cloud computing top threats in 2013. In: Cloud Security Alliance, Top Threats Working Group and Others (2013). http://www.cloudsecurityalliance.org/topthreats
5. Barham, P., Dragovic, B., Fraser, K., Hand, S., Harris, T., Ho, A., Neugebauer, R., Pratt, I., Warfield, A.: Xen and the art of virtualization. ACM SIGOPS Oper. Syst. Rev. 37(5), 164–177 (2003)