1. Mell, P., Grance, T.: The NIST definition of cloud computing. National Institute of Standards and Technology, Gaithersburg (2011)
2. Synergy Research Group, 2016 review shows $148 billion cloud market growing at 25% annually (2017). https://www.srgresearch.com/articles/2016-review-shows-148-billion-cloud-market-growing-25-annually
3. Dikaiakos, M., Katsaros, D., Mehra, P., Pallis, G., Vakali, A.: Cloud computing: distributed internet computing for IT and scientific research. IEEE Internet Comput. 13(5) (2009)
4. Mashayekhy, L., Nejad, M.M., Grosu, D.: Cloud federations in the sky: formation game and mechanism. IEEE Trans. Cloud Comput. 3(1), 14–27 (2015)
5. Synergy Research Group, Big four still dominate in Q1 as cloud market growth exceeds 50% (2016). https://www.srgresearch.com/articles/gang-four-still-racing-away-cloud-market