1. Nakamoto S. Bitcoin: A peer-to-peer electronic cash system. https://bitcoin.org/bitcoin.pdf , 2019 -4-9. Nakamoto S. Bitcoin: A peer-to-peer electronic cash system. https://bitcoin.org/bitcoin.pdf, 2019-4-9.
2. WOOD G. Ethereum: A Secure Decentralised Generalised TransactionLedger[EB/OL].https://gavwood.com/paper.pdf , 2019 -4-11. WOOD G. Ethereum: A Secure Decentralised Generalised TransactionLedger[EB/OL].https://gavwood.com/paper.pdf, 2019-4-11.
3. Buterin V. On public and private blockchains. https://blog.ethereum.org/2015/08/07/on-public-and-private-blockchains Buterin V. On public and private blockchains. https://blog.ethereum.org/2015/08/07/on-public-and-private-blockchains
4. Schwartz D Youngs N Britto A. The Ripple protocol consensus algorithm. https://ripple.com/files/ripple_consensus_whitepaper. pdf Schwartz D Youngs N Britto A. The Ripple protocol consensus algorithm. https://ripple.com/files/ripple_consensus_whitepaper. pdf
5. ConsenSys. BTC Relay's documentation. http://btc-relay.readthedocs.io/en/latest/ ConsenSys. BTC Relay's documentation. http://btc-relay.readthedocs.io/en/latest/