RAHARDJA, U.; HIDAYANTO, A. N.; PUTRA, P. O. H.; HARDINI, M. Immutable Ubiquitous Digital Certificate Authentication Using Blockchain Protocol. Journal of Applied Research and Technology, [S. l.], v. 19, n. 4, p. 308–321, 2021. DOI: 10.22201/icat.24486736e.2021.19.4.1046. Disponível em: https://jart.icat.unam.mx/index.php/jart/article/view/1046. Acesso em: 2 may. 2024.