1. Alexander, S. Gillis. (2021). Bitcoin. https://www.techtarget.com/whatis/definition/Bitcoin
2. Kate, Ashford. (2022). What Is Bitcoin And How Does It Work? (June 8, 2022, 5:12 pm). https://www.forbes.com/advisor/investing/cryptocurrency/what-is-Bitcoin/
3. Jake, Frankenfield. (2022). What is Bitcoin? How to Mine, Buy, and Use it (November 22, 2022). https://www.investopedia.com/terms/b/Bitcoin.asp
4. Philipp, Hacker. (2019). Corporate Governance for Complex Cryptocurrencies? A Framework for Stability and Decision Making in Blockchain-Based Organizations. in Philipp Hacker et al. in Regulating Blockchain: Techno-Social and Legal Challenges, 140-166, Oxford Univ. Press.
5. Joseph, Poon. and Thaddeus, Dryja. (2016). The Bitcoin Lightning Network: Scalable Off-Chain Instant Payments. http://lightning.network/lightning-network-paper.pdf. See also Aaron van Wirdum. (2018). The History of Lightning: From Brainstorm to Beta, (April 4, 2018) Bitcoin Magazine