Dr. M. R. Arun, Prof. M. R. Sheeba, and Prof. F. Shabina Fred Rishma. “Comparing BlockChain With Other Cryptographic Technologies (DAG, Hashgraph, Holochain)”. International Journal of Computer Engineering in Research Trends, vol. 7, no. 4, Apr. 2020, pp. 13-19, https://www.ijcert.org/index.php/ijcert/article/view/575.