https://github.com/EOSIO/Documentation/blob/master/zh-CN/Roadmap.md
https://bytemaster.github.io/bitshares/2015/01/04/Delegated-Proof-of-Stake-vs-Proof-of-Work/
https://bytemaster.github.io/article/2016/02/10/How-to-build-a-decentralized-application-without-fees/
https://steemit.com/dpos/@dantheman/dpos-consensus-algorithm-this-missing-white-paper