1. 1. Nakamoto S.: Bitcoin: A Peer-to-Peer Electronic Cash System (2008).
2. 2. Crosby M., Pattanayak P., Verma S., Kalyanaraman V.: Blockchain technology: beyond bitcoin. Appl. Innov. 2016. 2(6).,P. 6-10.
3. 3. McPhee C., Ljutic A.: Blockchain. Technol. Innov. Manag. Rev. 2017. 7(10). P. 3-5.
4. 4. Electricity journal homepage: blockchain technology: will it make a difference? Electr. J. 2017. 30 (3). P. 86-87.
5. 5. Finextra: Marine Transport International Applies Blockchain to Shipping Supply Chain (2016). URL: https://www.finextra.com/ pressarticle/66223/marine-transportinter-natio¬nal-applies-blockchain-to-shipping-supply-chain