1. [1] S. Nakamoto, “Bitcoin: A Peer-to-Peer Electronic Cash System,” 2008. [Online]. Available: https://bitcoin.org/bitcoin.pdf [Accessed: 8 May 2018].
2. [2] A. Narayanan, J. Bonneau, E. Felten, A. Miller, and S. Goldfeder, Bitcoin and Cryptocurrency Technologies. Princeton University Press, 2016, 308 p.
3. [3] G. Hileman & M. Rauchs, Global Blockchain Benchmarking Study. Cambridge, United Kingdom: Cambridge Centre of Alternative Finance, Sept. 2017. Available: https://ssrn.com/abstract=3040224 [Accessed: 8 May 2018].
4. [4] D. Yang, J. Gavigan, and Z. Wilcox-O'Hearn, Survey of Confidentiality and Privacy Preserving Technologies for Blockchains, 2016. Available: https://www.r3.com/wp-content/uploads/2017/06/survey_confidentiality_privacy_R3.pdf [Accessed: 8 May 2018].
5. [5] Citi Group. [Online]. Citi GPS: How FinTech is Forcing Banking to a Tipping Point, March 2016. Available: https://www.citivelocity.com/citigps/ [Accessed: 3 May 2018].