European Commission. (2012). Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Unleashing the Potential of Cloud Computing in Europe. Retrieved from http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=COM:2012:0529:FIN:EN:PDF.
Tweneboah-Koduah, S., Endicott-Popovsky, B., Tsetse, A. (2014). Barriers to Government Cloud Adoption. International Journal of Managing Information Technology 6, 3. Retrieved from http://airccse.org/journal/ijmit/papers/6314ijmit01.pdf.