Utilization of Blockchain Technology for Management E-Certificate Open Journal System. APTISI Transactions on Management, [S. l.], v. 4, n. 2, p. 133–138, 2020. DOI: 10.33050/atm.v4i2.1293. Disponível em: https://ijc.ilearning.co/ATM/article/view/1293. Acesso em: 11 sep. 2026.