IQBAL, M.; VARSHNEY, M. Blockchain validation framework for COVID-19 testing kit. International journal of health sciences, [S. l.], v. 6, n. S5, p. 1261–1275, 2022. DOI: 10.53730/ijhs.v6nS5.8861. Disponível em: https://sciencescholar.us/journal/index.php/ijhs/article/view/8861. Acesso em: 8 may. 2026.