ARYA RADITYA PRAWIRA PUTRA, Dendi; PURWANTO, Yudha; PARYASTO, Marisa. Implementation of Blockchain as Covid-19 Test and Vaccine Certificate Storage System. Journal of Computer Engineering, [S. l.], v. 1, n. 02, p. 63–71, 2022. DOI: 10.25124/cepat.v1i02.5189. Disponível em: https://journals.telkomuniversity.ac.id/cepat/article/view/5189. Acesso em: 28 sep. 2025.