1. Proof of work: energy inefficiency and profitability;Agung;J. Theoretical Appl. Inf. Technol.,2019
2. Blockchain Luxembourg, S.A. Blockchain Size, [Online]. Available: https://www.blockchain.com/charts/blocks-size. [Accessed 22 April 2019].
3. Broklyn Microgrid, [Online]. Available: https://www.brooklyn.energy/. [Accessed 24 11 2019].
4. Buterin, V., 2015. Ethereum Whitepaper.
5. The economics of cryptocurrencies – bitcoin and beyond;Chiu;SSRN Elect. J.,2007