Aponte, F., L. Gutierrez, M. Pineda, I. Meriño, A. Salazar, and P. Wightman. “Cluster-Based Classification of Blockchain Consensus Algorithms”. IEEE Latin America Transactions, vol. 19, no. 4, June 2021, pp. 688-96, https://latamt.ieeer9.org/index.php/transactions/article/view/3875.