OZTURAN, C. Barter Machine: An Autonomous, Distributed Barter Exchange on the Ethereum Blockchain. Ledger, [S. l.], v. 5, 2020. DOI: 10.5195/ledger.2020.148. Disponível em: https://ledger.pitt.edu/ojs/ledger/article/view/148. Acesso em: 15 aug. 2022.