Torrecillas, A. C. P., and R. Sakayemura. “Theoretical and Practical Aspects about Attachment of Cryptocuyrrencies”. Refas - Revista Fatec Zona Sul, vol. 5, no. 5, July 2019, pp. 1-11, doi:10.26853/Refas_ISSN-2359-182X_v05n05_07.