Mattos, Olívia Bullio, Saulo Abouchedid, and Laís Araújo e Silva. 2020. “The Cryptocurrencies and the New Challenges Faced by the Monetary System: A Post-Keynesian Perspective”. Economia E Sociedade 29 (3). Campinas, SP:761-78. https://periodicos.sbu.unicamp.br/ojs/index.php/ecos/article/view/8663621.