Bitcoin Protocol: https://en.bitcoin.it/wiki/Protocol_documentation
Bitcoin Nodes: https://bitnodes.earn.com/
Security Token Outlook: https://medium.com/@andysingleton/the-real-sto-market-outlook-near-death-b822afa22495
Bitcoin Liquid Index: https://bravenewcoin.com/enterprise-solutions/indices-program/blx
Always do your own research. The above references an opinion and is for information purposes only. It is not intended to be investment advice. Seek a duly licensed professional for investment advice.