http://www.ornavi.com/2015/03/17/cloud-adoption-barriers/
http://www.northbridge.com/2013-future-cloud-computing-survey-reveals-business-driving-cloud-adoption-everything-service-era-it
http://mjskok.com/news/news-breaking-down-barriers-to-cloud-adoption
http://www.rackspace.com/blog/cloud-computing-more-secure-than-you-think/
http://www.imagineiti.com/the-cloud/is-the-cloud-secure/
http://www.computerweekly.com/opinion/Cloud-vendor-lock-in-our-experience
http://searchcloudapplications.techtarget.com/definition/vendor-lock-in
http://www.theguardian.com/technology/2014/sep/01/naked-celebrity-hack-icloud-backup
https://ico.org.uk/for-the-public/online/cloud-computing/
http://cloudtweaks.com/2012/06/why-redundancy-in-the-cloud-is-a-marvelous-thing/
http://www.computerworld.com/article/2508726/cloud-computing/cloud-interoperability–problems-and-best-practices.html?page=2
http://www.cdwnewsroom.com/2013-state-of-the-cloud-report/
http://www.cloudcomputingadmin.com/articles-tutorials/compliance-regulations/standards-and-good-cloud-practice.html
http://www.computerweekly.com/news/2240186451/Users-want-reduced-cloud-complexity-and-more-interoperability-study-finds
http://www.huffingtonpost.co.uk/matthew-finnie/cloud-computing_b_3913945.html