1. N. Satoshi, Bitcoin: A peer-to-peer electronic cash system, https://bitcoin.org/bitcoin.pdf.
2. R3, https://www.r3com/.
3. Hyperledger, https://www.hyperledger.org/.
4. Bitcoin, gold and the dollar–A GARCH volatility analysis;Dyhrberg;Finance Res. Lett.,2016
5. P. Katsiampa, Volatility estimation for bitcoin: A comparison of GARCH models, Econ. Lett.